Autodesk Revit Changelog

What's new in Autodesk Revit 2024

Apr 5, 2023

Introducing Site Tools for Revit & Revit LT:
This new toolset supports the design and documentation of richly detailed landscapes. You can use Site Tools to:
Collect and rationalize existing conditions data from CAD Imports, CSV point files, and more.
Model your design intent freely and easily, with versatile site and massing tools for modeling topography.
Populate schedules, sheets, and views and calculate material quantities. Cut, fill, join, and run phasing scenarios. Use the design-to-documentation engine of Revit to save time and improve design quality when modeling landscape and site conditions.
Save time in concrete detailing:
Structural engineers and rebar detailers have new capabilities for creating, scheduling, and documenting rebar. Use the new bar bending details to:
Create reinforcement drawings and schedules with detailed fabrication instructions. With this new tool in Revit, when the model changes, the details adapt along with it.
Add and customize rebar bending details so that your views and sheets respect your typical practice.
Reduce errors and omissions in your document sets.
Evolve work together:
Link Coordination Model from Autodesk Docs into Revit makes it easier for project teams to sync and coordinate design deliverables. Keep project files light and teams on the same page.
Link models and views from any of the 60+ formats supported by Docs and the Autodesk Construction Cloud directly into Revit.
Underlay the coordination model as visual reference when designing in Revit.
Reduce the need for interpretation when coordinating up-to-date design deliverables with partners and project teams.
Also in release:
Spacemaker to Revit Sync
Twinmotion for Revit Auto-Sync
Insight Tech Preview for Revit 2024
Upgrades to Project Browser
Dynamo for Revit 2.17
New Revit Cloud Model to ACC Bridge connection
Revit Data Exchange Connector with Autodesk Docs
Dark Theme and UI modernizations
New Model Content “Snowdon Towers”
Release of My Insights in Revit Home
Release of Revit Data Exchange Connector with Autodesk Docs
Upgrades to Parameters Service with Autodesk Docs
Structural Analytical Modeling enhancements
Electrical Load Analysis enhancements
Energy Analytical Modeling enhancements
Ductwork stiffening enhancements
Layout upgrades for views, sheets, and schedules

New in Autodesk Revit 2023 23.0.11.19 (Jun 20, 2022)

Go-to modeling and documentation tools are expanded and fine-tuned:
Like last year’s release, 2023 is packed with improvements that target everyday design to documentation workflows. We’re smoothing edges on tools you’re already familiar with, so you see immediate benefits in your work. Filter by sheet in schedules, for one, is a solid addition for ensuring the right data winds up in your documentation sets. And schedules continue to get built out, with conditional formatting added to key schedules for families and types, an enhancement sourced from the Revit community. You’ll also find new features to control the display and tagging of displaced elements, bringing more clarity to complex annotations. View filters, more cuttable categories, and a new Measure in 3D tool are in Revit 2023 and mark the well-rounded advancement of Revit as a professional-grade, design-to-documentation workhorse.
More flexibility and control for structural engineers with revamped analytical modeling:
More speed, the versatility you need, and quality control your clients will appreciate drive a shift toward a new analytical modeling workflow for structural engineers. Model in context in 2D and 3D views to define design intent autonomously from the physical model, or start with a parametric, “analysis-first” approach to develop the analytical model from the engineering requirements for buildings, roofing structures, pavilions, stairs, and beyond. With more automation for your steel connection libraries and many improvements for rebar, including adaptive placement and better visualization, Revit 2023 is a more complete toolset for the structural engineer and detailer.
Plan-based load analysis for electrical engineers is a time saver in a project’s early stages:
A new electrical analysis workflow introduced in Revit 2023 is designed to use linked DWGs, PDFs, or Revit models as the basis for load takeoffs within Revit.  These load takeoffs, along with new capabilities to conceptually define electrical system elements, allow you to determine preliminary building load and load on main equipment components directly within the Revit environment.
Finer data fidelity, from form-making to documentation, with 3D Sketch in Revit and FormIt Pro:
The FormIt Pro to Revit 3D Sketch workflow connects free-hand and computational form-making in FormIt Pro to the brass tacks of design development and documentation in Revit. Save on modeling time and rework and leverage early-stage analysis to assess and seamlessly transition design concepts into design deliverables. Also for early-stage design, Autodesk is looking for your feedback on a new Spacemaker to Revit add-in, now available in beta for European subscribers and with Spacemaker trials. Keep scrolling for more details.
BIM data unleashed, with Revit 2023 and Autodesk Docs:
New features in Autodesk Docs expose Revit data to new frontiers in collaboration, interoperability, and automation. Revit 2023 showcases new ways to manage and share data, with Data Exchanges in Autodesk Docs. Two workflows debut with Revit 2023: an architecture to fabrication workflow between Revit and Inventor, and coming soon, a Revit to Microsoft Power Automate connection that brings design data to business process automation within the Microsoft ecosystem of applications. These new workflows, along with the introduction of the Revit Parameter Service in technology preview, pave the way to more effective, timely, and secure data management with the AEC Collection.
Check out a fresh look and feel for Generative Design, Dynamo Player, and Dynamo 2.13:
A visual refresh drives consistency across Generative Design and Dynamo Player, intended to make both new and experienced computational designers more successful. Interface modernizations for Generative Design and Dynamo Player include sliders, numeric entry boxes, more in-menu descriptions, and easier to find product help and support. For Dynamo 2.13, updated details abound, including upgrades for Groups, scroll-over actions for Wires, and the ability to pin, watch, and organize nodes and graphs.

New in Autodesk Revit 2022 22.0.2.392 (Apr 17, 2021)

New in Autodesk Revit 2020.2.0.0 (Jun 11, 2019)

Enhancements:
API:
Created a new 2D Exporter API to allow exporting geometric elements and properties of the elements from plan, section, and elevation views.
Added the ability to create, modify, and apply view templates through the API, so that view templates can be created and fully managed without the Revit user interface.
Added a new API method for specifying the minimum width of dockable dialogs.
Added an API method to get the name of a built-in category, without the need to open a project file.
Added a new API method that can be used to check if a built-in category id corresponds to a category in Revit.
Added the Parameter.ClearValue() method in API to reinitialize a shared parameter's value, provided its HideWhenNoValue flag is true.
Added the ability for the API to extract information about the elements that created a specific part.
Cloud Render:
Added the ability to customize the timeout value for cloud rendering upload through a configurable file.
DirectShape Elements:
Added the ability to create parts from DirectShape elements.
Duct:
Added the ability to set pipe location based on top elevation or bottom elevation.
Dynamo for Revit:
Integrated Dynamo Revit 2.1 into the Revit 2020 release.
Electrical:
Revised the justification behavior for conduit to respect the outside diameter instead of the nominal diameter.
Added API to enable defining feed through lug as the circuit connection type.
Added the ability to connect an electrical panel using feed through lugs.
Changed the Electrical Panel type parameter MCB Rating into an instance property.
Changed the Electrical Panel type parameter SubFeed Lug into an instance property.
Added options for arrow style on electrical wire home run.
Added options to control the quantity of arrow heads on the home run.
Added the option to show a tick mark on the end home run wire only.
Energy Analytical Model:
Added the Analytical Properties group to analytical surfaces in the Properties palette for read-only inspection.
Enhanced openings in the energy analytical model to always be less than 100% of the parent surface area to allow energy analysis tools to simulate successfully.
Enhanced energy analytical model surfaces by merging adjacent and aligned small surfaces to create larger, simpler surfaces.
Added the Reference Level property to analytical spaces which reports "Not Available" in Revit 2020, but is reserved for future use.
Added the "Define Thermal Properties by" parameter to window, door, and curtain panel types to support assignment of analytical properties by schematic, building type, or user-defined values.
Replaced the 3D Energy Model view that is automatically generated when creating the Energy Analytical Model, with a view called Analytical Spaces that displays only analytical spaces with the model categories set as underlay.
Export FBX:
Updated the FBX exporter to include the latest security updates.
Fill Patterns:
Improved validation of fill pattern names to prevent duplicate names.
Added brackets <> to the No Pattern option in the Fill Patterns dialog to conform to the standard for non-editable system types.
Import/Export/Link SAT/SKP files:
Enhanced Sketchup import to support Sketchup files through version 2018 and brought in transparency in addition to color.
Set the Material Class property value to the imported file extension to allow for better searching in the Materials dialog for materials newly created during the import of SAT, SketchUp, and Rhino files.
Added a warning when a SketchUp file has a non-uniform scaling transform.
Removed the unused Orient to View, Colors, and Correct Lines Slightly Off Axis options from Import CAD and Link CAD when choosing Sketchup files.
InfoCenter and Communication Center:
Removed items related to the Communications Center and changed the Search text box to collapse by default, so that model and view names are more visible.
Legends:
Added the ability to copy and paste legend views across sheets.
Levels:
Improved the behavior of the scope box tool in 3D views so that when a scope box is removed from a 3D view, the section box remains enabled, and in the same location it was in when it was originally associated with the scope box.
Link Topography:
Added a reminder to update Desktop Connector when it is out of date while using link topography.
Materials:
Added the class AdvancedGlazing to the API to give access to predefined properties related to the physically-based glazing appearance asset schema.
Added 104 new material appearance assets with physically-based definition.
Improved the Material Browser user interface to improve the function of the material filter and material library.
Improved security for functions related to RPC objects.
Added support for 256 x 256 thumbnail size in the Material Browser to provide a larger preview.
MEP Connectors:
Improved the nested family connector location so that it is properly located as defined in family definition instead of at origin.
MEP Fabrication:
Improved the Change Service feature to better support multi group/shape selections.
Added the ability to create comma-delimited files from MEP fabrication models.
Added the ability to set the location of fabrication parts based on top or bottom parameters.
Improved the API to enable identification of identical parts that are different as a result of slope deflection.
Improved performance when using the Edit Part dialog in large models.
Improved the performance of generating previews when opening the Edit Part dialog to modify fabrication elements.
MEP Miscellaneous:
Added the ability to use the Elevation parameter in tags, schedules, and view filters.
Added Default Elevation as a type parameter for non-hosted elements.
Renamed several parameters for specifying offset and elevation and relocated them on the Properties palette.
Added ability to schedule, tag, and use view filters for the Elevation parameter with cable tray fitting, conduit fitting, duct fitting, and pipe fitting.
Improved behavior to retain the element location when changing the Level property, updating the Elevation from Level property instead.
Added the ability to schedule and use view filters for level parameter with air terminals, fittings, accessories, and plantings.
Relocated the Schedule Level parameter in the Properties palette closer to the Elevation from Level parameter.
Improved behavior to retain the location of face hosted elements when the bottom of a wall is adjusted in a linked model.
Open and Save Files:
Added a new dialog to display a warning when Revit detects a file saved outside of Autodesk software.
PDF and Raster Images:
Added the ability to add a raster image or PDF from Desktop Connector for use with Revit Cloud Worksharing and BIM 360.
Enabled the properties Horizontal Scale and Vertical Scale for a raster image or PDF so they are directly editable to scale the instance.
Added the ability to use a relative path for a raster image or PDF in the Manage Images dialog.
Improved the scale of images to preserve it on Reload and Reload From, so a new image is not stretched into the boundary of the existing image.
Improved the failure notification when a raster image or PDF fails to load.
Improved reload from the Manage Images dialog so a renamed image keeps its user created name.
Added tooltips to the Manage Images dialog that report size and other information about the selected image.
Added a new status in the Manage Images dialog called In Project for a raster image that is a saved image or saved rendering to clarify why it has no saved path.
Added the ability to directly import a single or multi-page PDF file into a view as a view specific object at a selected resolution, enable snapping if the PDF file contains vector data, and manage it in Manage Images.
Railing:
Localized top and bottom reference names for balusters to allow exchanges of Revit files with multiple languages.
Reinforcement:
Added the ability to use Multi-Rebar Annotations to dimension the position of rebar sets with respect to the concrete host faces, or to any other dimension reference in Revit.
Added the ability to use Multi-Rebar Annotations to dimension free form rebar sets with planar and parallel bars in any 2D view perpendicular to the bar planes.
Added the ability to use Multi-Rebar Annotations for rebar sets with single segment bars in any 2D view, regardless of the view orientation.
Copying and moving shape-driven rebar is now more predictable, making rebar modelling more accurate and respecting the design intent.
Improved the rebar editing performance for stirrups placed in a host that contains a large number of bars.
Improved the behavior of standard rebar to not snap automatically to parallel stirrup bars when placing or modifying the bars.
Improved the behavior of shape driven rebar to not snap automatically to the concrete cover when copying or moving the bars.
Improved the placement and modification behavior of shape-driven rebar to automatically constrain only to host faces and stirrups that are in range of the bars.
Improved the behavior of rebar to automatically match user selected constraints when copying bars to a similar structural host.
Improved the creation of free form rebar through the API to also react to changes of specified shared parameters.
Added the ability to host any type of reinforcement, either shape driven or free form rebar in model-in-place structural elements of the Stairs category.
Fixed an issue that occurred with certain combinations of rebar type/shape that resulted in the reinforcement not displaying in 3D views when set to display as solid geometry.
Revit Cloud Models:
Added the ability to initiate a workshared cloud model with File > Save as Cloud Model.
Revit Home:
Improved the Revit Home error message when Revit cannot connect to the cloud server.
Replaced the original BIM 360 entrance from open dialogue to new cloud model browser in Revit Home.
Route Analysis:
Added the Route Analysis: Path of Travel feature, which draws an optimized path from a point A to point B by clicking on two points in a floor plan.
Schedules:
Enabled the ability to retain the most recent zooming level when opening a schedule view in the same Revit session.
Added the ability to show/hide gridlines for schedules using the API.
Added two new filter operators, "parameter has value" and "parameter has no value", that allow filtering elements based on one of the parameters having a value or being empty.
Steel Connections:
This feature provides an easy way to propagate (re-create) a steel connection in the current project where the exact same situation is found.
Added parameters for weight, paint area, and bolt length to steel fabrication elements to enhance the editing and annotation, and to ensure scheduling accuracy.
Added the ability to reuse steel connection configurations between Revit models by making connection parameters act as type parameters.
Improved the messages that display during the creation of steel connectors.
Added a Structural Material parameter for steel fabrication plates and profiles sub-elements, that is available in the Properties palette, tags, and schedules.
Added the ability to control the parameters for the holes created by Bolts and Anchors in the Properties palette.
Added the ability for radial and diameter dimensions to be added to holes for steel elements.
Added a new API method which verifies if there are any tasks in progress.
Added the ability to create dimensions on the center of holes and shear studs for steel elements. The snap points of the shear studs are only available in wireframe visual style. The snap points for the center of holes are available regardless of the visual style.
Disabled the Customize and Edit tools while editing custom connections. The Break tool is only available for connections that are not part of the respective custom connection.
Fixed an issue so that the Redo tool is available after Undo and Save are used on steel elements.
User Interface:
Fixed tooltips for Filter List control in View Filters dialog, so that if the filter name is wider than the control width, the tooltip will appear with the full name.
View:
Improved the selection of categories to be more flexible and to extend the set of allowable parameters for an individual OR rule in view filters.
Added the ability to resize the Select Views dialog.
Added the ability to schedule the scope box parameter of views so that it can be visible and editable in the view list schedule.
Wall:
Added the ability to create an elliptical wall or curtain wall.
Issues Resolved:
3D Shapes:
Improved stability when Revit geometry with very small features was processed for export or display.
Analytical Duct/Pipe Connections:
Disabled materials from the analytical pipe connection element which didn't work with materials.
API:
Fixed an issue where placed family instances would disappear when using "Drag-and-Drop" in the UIAPI SDK sample to place a family instance.
Improved an API exception message when creating a duct, pipe, cable tray, or conduit length is too short.
Improved the API documentation for FilterCategoryRule.
Improved the ability for RvtSamples to load all external commands in SDK Samples.
Fixed an issue where RevitAddInUtility, RevitAPIMacros, and RevitAPIUIMacros XML files are missing from installation, which would prevent Intellisense from working with these libraries.
Fixed an API issue where DialogBoxShowing event failed to capture a dialog during model opening process.
Improved documentation for the API Face.Intersect function.
Improved the behavior of the API for model groups so that isolating model groups results in consistent behavior when the action is taken via the API and Revit's user interface.
Improved validation of the angle parameter for radial array creation APIs.
Fixed an issue with the electrical temperature rating type to ensure the unused insulation type or wire size can be removed through the API.
Fixed an issue with the API sample "family instance placement" when placing an instance which could result in the inability to quit the editing mode.
Remove the previously deprecated APIs AssetProperty.Item[String] and Application.Assets[AssetType].
Fixed an issue that prevented a 32-bit installation process to use RevitAddInUtility.dll to install a Revit add-in.
Added the options for Convert Lights, Convert linked CAD formats and faceting factor to the API NavisworksExportOptions.
Fixed an issue preventing the SDK sample PowerCircuit from executing.
Fixed an issue that resulted in API calls excluding some elements in the Related Warning dialog.
Added missing API documentation for XYZ, DuctSizeSettings, ExportFontTable, ExportLayerTable, ExportLinetypeTable, ExportLineweightTable, ExportPatternTable, and IFCAggregate.
Corrected the use of the API UIDocument.CanPlaceElementType to properly validate element placement for the current active view.
Removed the previously deprecated APIs: FilledRegionType.Background, FilledRegionType.Color and FilledRegionType.FillPatternId.
Fixed an issue that resulted in the API of Temporary View Templates not updating the user interface.
Improved the API documentation to clarify the use of the BuiltInParameter.TEXT_FONT of TextNoteType.
Improved stability when making changes to Extensible Storage via the API when in the DocumentSavingAs event.
Improved API documentation to indicate TesselatedShapeBuilder supports only one material for meshes.
Autodesk A360 Sign In:
Improved stability when signing into Autodesk Account.
Fixed an issue with the sign-in dialog update.
Beam system:
Fixed an issue that prevented models containing beam systems with beam type not available to be upgraded to new version.
Beam:
Fixed an issue with the beam join cut update after changing the geometry of the joined elements.
Cloud Model:
Improved the warning message when opening a workshared cloud model from the Recent Files pane in Revit LT.
Improved the text display in the Save as Cloud Model dialog for localized versions.
Corrected the help link for "Why can't I enable worksharing?".
Fixed an issue that caused the initiation of a non-workshared cloud model to fail when selecting an element.
Fixed a memory leak issue with cloud models.
Cloud Render:
Fixed an issue that resulted in the display of some buttons in the Cloud Render dialog being cut off when the system DPI is high.
Column:
Updated the keyboard shortcut for column on the Architecture tab from “C” to “CO” to allow the use of the "CL" key tip.
Removed the Area parameter from the list of parameters returned by API method Element.Parameters for beams and columns.
Content:
Fixed the constraint issue of LL Träger doppelt.rfa in the German library.
Fixed an issue where exporting to DWG from the family editor of a rebar coupler family was not possible.
Corrected formatting in RevitKeynotes_JPN.txt.
Curtain System:
Fixed an issue that prevented setting the mullion type through the API.
Design Option:
Fixed an issue in which the Delete Dedicated Option Views dialog would display as empty.
Fixed an issue that caused face-based components, such as Lightning fixtures, to get deleted when the primary design option is changed.
Fixed an issue where setting the "Visible in option" view parameter via the API would not update the view.
Dimensions:
Improved stability when working with families which contain incorrect dimension constraints.
Corrected a misspelling in the dimension user interface.
Fixed an issue that leads to instability when working with arc length and linear dimensions.
Improved stability when selecting a dimension in a family file.
Improved stability when exporting dimensions to DWG files.
Improved stability when upgrading files with dimensions.
Fixed an issue with icon/grip size that occurred when displaying temporary dimensions.
Display:
Fixed an issue with cut off text at some resolutions in the Graphics Display Options dialog on 4K monitors.
Fixed an issue with cut off text at some resolutions in the Color Correction dialog on 4K monitors.
Improved stability when changing an orthographic 3D assembly view to a perspective view.
Improved stability when upgrading Revit files from pre-2016 versions due to issues with the Pen Width Table.
Improved the error message when attempting to load a corrupt image file so that it is clear why the file was not loaded.
Fixed an issue where pan and orbit stopped working in an uncropped perspective view after an error dialog was closed.
Fixed an issue where Revit would create hidden lines from Model Lines when they are above other elements with Hidden Lines set to All.
Improved stability when family content is loaded into a Revit model and customer-created RPC assets are missing from the system library.
Fixed an issue in structural discipline views so that Beyond line types do not show through geometry that is in front of them on screen or when printed.
Divided Surface:
Resized the Default Divide Settings dialog so that all controls are fully visible in Windows 10.
Duct/Pipe Display:
Fixed an issue that could cause extended lines to appear inside single line pipe rise and drop symbols when printing.
Duct/Pipe Pressure Loss Calculations
Corrected an error in the tooltips for the On Duty and On Standby tools that are available when creating or editing a mechanical equipment set.
Fixed an issue that prohibited the bounding box lines around a pump set from being cut properly by a 3D scope box.
Fixed an issue that could cause a system to have an incorrect flow value after modifying the connection at a hydraulic separation point.
Fixed an issue that could cause the tag for a pump set to move when one of the parameters is modified.
Dynamo for Revit:
Improved stability when searching the Dynamo package manager.
Fixed an issue where Dynamo nodes do not work as expected in the Japanese version.
Improved stability clicking Undo or Redo in Dynamo Revit and then exiting Revit.
Electrical Cable Tray and Conduit:
Improved the behavior when changing diameter of conduit and pipe to retain the top or bottom justification.
Improved behavior when creating similar for cable tray and conduit to inherit vertical justification.
Fixed an issue that could result in an inaccurate length reported on a conduit run after changing conduit type.
Fixed an issue that could result in an inaccurate length reported on a cable tray run after changing cable tray run type.
Electrical Circuits:
Fixed an issue causing circuiting disconnects when reloading families after adding non-power connectors.
Fixed an issue causing lighting fixtures to be disconnected from a power circuit when adding to a switch system with the right-click menu.
Fixed an issue related to circuit path editor not having consistent Undo/Redo behavior.
Electrical Miscellaneous:
Fixed an issue that prevented changing the type of a family instance that contained a nested work-plane based nested family.
Fixed an issue with the type selector not working on family instances that have multiple connectors mapped to the same voltage parameter.
Improved performance when selecting an electrical panel in a model containing a large quantity of circuits.
Electrical Panel Schedule:
Fixed an issue that resulted in the load summary on a panel indicating that a connected load is present when no load is connected to the panel as a result of copying a panel instance.
Improved stability related to multiple warnings being displayed after editing a text field in a panel schedule.
Fixed an issue which prevented exiting panel schedule template editor mode when working on two models simultaneously.
Enabled the Move To control in a panel schedule when Max #1 Pole Breakers is set to 0.
Improved the behavior when resizing columns with multiple selected columns in the loads summary section of the panel schedule template editor.
Improved stability when attempting to paste or place a panel schedule instance on a non-sheet view.
Electrical Wiring:
Fixed an issue causing a wire to be created with a type other than that selected in the type selector when drawing a wire from electrical equipment.
Energy Analytical Model:
Improved the icons used for the Create Energy Model and Delete Energy Model tools in the ribbon.
Added energy analytical information to analytical spaces in the UI, such as properties palette and schedules, based on the building type or HVAC space when creating the energy model.
Fixed an issue that resulted in the "Create Energy Model" tool and the "Delete Energy Model" tool becoming hidden and inaccessible to the user.
Fixed an issue that changed the Create Energy Model tool to Delete Energy Model when creating an energy model fails.
Error Handling:
Improved stability when clicking Quit Path in 3D Path edit mode.
Export to DGN file format:
Improved stability when exporting to DGN using the old Revit 2012 algorithm.
Export to DWG/DXF file format:
Fixed an issue so that steel fabrication elements and steel connections are exported to DWG as AutoCAD blocks.
Export to FBX file format:
Fixed an issue that occurred when exporting an FBX file from 3D views on sheets.
Family:
Improved performance when upgrading a project containing many geometrically complex families.
Improved stability when a family containing an invalid import instance is loaded into a model.
Fixed an issue causing material parameters to duplicate when using Transfer Project Standards between a family file and a model file.
Improved Purge Unused performance when purging files with large imports.
Fixed an issue where an IF statement formula used in a text parameter could produce inconsistent results.
Improved stability when reloading families if there were inconsistencies in type catalog parameters.
Improved stability when offsetting a wall that hosts elements with nested families.
Fixed a placement problem for hosted inserts when they are placed exactly over a demolished one.
Fixed an issue that occurred when reloading a modified form-based family into a model.
Improved stability by adding a prompt to reload a family when critical data has been lost.
Improved stability when modifying a family parameter that utilizes tangency lock constraints.
Fill Patterns:
Fixed an issue in the Edit Pattern Properties dialog so that the text string "Import scale:" string is fully visible.
Filter Selection:
Improved performance of the Filter Selection dialog.
Improved performance of the Selection Filter dialog in models with a high level of detail.
Floor:
Fixed an issue that resulted in a tag on a floor element not updating the top/bottom core elevation when updating the Project Base Point elevation.
Form Elements:
Improved stability in a workshared environment for models that contain Form Elements.
Formulas:
Fixed an issue that resulted in an error message not displaying the name of the invalid parameter when managing lookup tables.
Groups:
Fixed an issue that occurred during placement of a model group instance containing a face-based family which, when positioned at adjacent locations, could cause the family to lose its association to the host element.
Improved stability in Edit Group Mode when using the Undo/Redo commands.
HVAC Zones:
Fixed a issue that caused Revit to hang when creating a section view.
IFC:
Improved geometry when linking in some IFC files that have been incorrectly optimized by the Solibri IFC optimizer.
Fixed an issue that caused several IFC common properties to export without units.
Added the ability to export some fabrication parts to IFC as proxies instead of ignoring them.
Fixed an issue with the IFC export of some slanted piles.
Fixed an issue in which the site elevation value was doubled when linking in some IFC files.
Fixed an issue that resulted in the incorrect orientation of some elbow pipe or duct segments after IFC export.
Fixed the size and location of the stairs landing bounding box exported to IFC when metric units were used.
Improved the automatic repair of invalid geometry when opening IFC files.
Added the ability to import properties for all structural elements when opening an IFC file.
Improved memory usage when linking in IFC files with geometric inaccuracies.
Fixed an issue that affected the import of some elements with an empty Load Bearing attribute when linking in IFC files.
Improved performance when exporting some files with highly faceted geometry to IFC.
Improved the linking of some scaled elements in IFC files.
Improved the IFC4 Design Transfer View MVD export of some objects with non-planar geometry.
Updated the two quantity names as Net Quantities that were incorrectly named as Gross Quantities in the IFC export.
Fixed the import of some elements with under-constrained positions when importing IFC files.
Fixed an issue that resulted in the creation of double openings for skylights when exporting IFC files.
Fixed an issue so that IFC export takes into account the Project Origin settings also for the steel fabrication elements.
Improved stability when setting the IFC class name in the IFC options dialog for certain languages.
Fixed an issue so that Export to IFC4 Reference View now properly exports walls with multiple openings.
Improved the generation of consistent IFC GUIDs when exporting doors and windows in sandwich walls.
Fixed an issue that resulted in missing openings in some in-place wall types created using the Open IFC command.
Fixed an issue with the import of some rebar with invalid swept disk solid end parameters in link IFC.
Fixed an issue that allowed multiple shared parameters of the same name in elements created by link IFC.
Fixed an issue to correct the placement and size of some beams exported to the IFC4 Reference View MVD.
Import from Inventor:
Improved memory usage when importing Autodesk files.
Import of CAD files:
Added measures to prevent the potential corruption of imported instances in Revit files.
Import/Export/Link DWF files:
Fixed an issue in which Revit fails to export a view to DWFx when the view name is over 200 characters.
Import/Link DWG/DXF files:
Improved the automatic repair of invalid NURBS curves when importing DWG files.
Fixed an issue where links to CAD files were incorrectly using absolute paths even when set to relative.
Improved memory usage when opening DWG files.
Install:
Removed support for Windows 8 and Windows 8.1.
Fixed an issue where running Personal Accelerator interfered with other programs on a system.
Added a warning message and link to install .Net 4.7v if it is not already installed.
Insulation lining:
Fixed an issue that caused pipe centerlines to not be visible when the insulation category is disabled.
Levels:
Improved stability when opening a 3D view of a model containing very small level extents.
Lines:
Fixed an issue in which Custom Lines could not be overridden by Hidden Lines because the display of user-created line types was controlled through the wall's subcategory, rather than the correct line subcategory.
Link Topography:
Fixed an issue where railings placed on linked topography were deleted after reloading a topography link if the linked topography didn't exist in the newer version of topography link.
Fixed an issue where the location of linked topography moved after reloading the link when more surfaces were added into the new version of the linked topography.
Fixed an issue when the version of a linked topography was incorrect in the link topography dialog when it is not accessible by Desktop Connector.
Fixed an issue where railings placed on a linked topography lost their host after unloading then reloading the topography link.
Fixed an issue where the incorrect help page was pointed to when Desktop Connector was an incompatible version.
Fixed an issue where individual topography elements were not pinned in a pinned linked topography model.
Improved the legibility of warnings with non-English language text when browsing published topography in a BIM 360 project.
Fixed an issue where the status of linked topography was not updated after changing the sign-in status of an Autodesk account.
Linked RVT Files:
Fixed an issue where Visibility/Graphic Overrides for Revit links could be overridden for Design Options when set to By host view or By linked view.
Improved the legibility of buttons in the Manage Links dialog with non-English language text.
Improved the legibility of buttons with non-English language text in the RVT Link Display Settings dialog when viewed on a high-resolution display.
Materials:
Fixed an incorrect Material Browser physical value in a Belgian template.
Fixed an issue that might lead to instability when working with materials.
Fixed an issue with replacing physical asset of materials.
Improved the Materials API so that it returns the full material name when the name includes a colon.
Fixed an issue that might lead to instability when working with a material appearance asset.
Fixed an issue with changing the material for a wall foundation.
Improved performance when opening the Materials Browser dialog.
Improved stability when working with the Materials Browser dialog.
Fixed an issue that caused a memory leak when working with the material library.
Improved stability when adding or loading materials.
Fixed an issue that prevented the ability to enter different language characters in Material Browser fields.
MEP Connectors:
Fixed an issue that prohibited piping systems using the same system type from merging when adding a branch using a tap connection.
Improved stability when opening some families containing MEP Connectors.
MEP Fabrication:
Improved the uninstall process to cleanly remove unneeded MEP Fabrication registry keys.
Fixed an issue that caused the size of ducts to change when using the Optimize Lengths tool on ducts with inside dimensions specified.
Improved the accuracy of the error message when loading additional MEP Fabrication parts with long path names.
Fixed an issue that caused ductwork straight development lengths and actual lengths to differ when using step-down connector types.
Improved movement propagation on sloped pipe systems to prevent parts from moving unexpectedly.
Fixed an issue that prevented taps from being placed for offset branches when using multi-point routing.
Fixed an issue causing disconnects due to flexed elbows resetting when using change type or reloading revisions.
Improved stability when changing the type on parts with added holes.
Improved the alignment of the Justification label in the ribbon.
Fixed an issue that resulted in custom data not being preserved when importing .maj files.
Improved the Fabrication Extensions user interface to support 4k monitors.
Fixed a memory leak that could occur when export fabrication job fails.
Removed the deprecated exportToMAJ API.
Improved the Reload Configuration tool to update product information on modeled part instances.
Mechanical Systems:
Fixed an issue that caused piping system errors when the secondary loop is separated from the primary loop.
Fixed an issue that kept analytical pipe connections from being highlighted while pre-selecting a system.
Fixed an issue that prohibited systems using the same system type from merging when connected through analytical pipe connections.
Fixed an issue that caused the assignment of supply and return piping systems to switch on network elements, when connecting a pipe to a fitting by dragging the pipe end with the connector grip.
ODBC Export:
Improved stability with newer ODBC drivers.
Open and Save Files:
Improved stability during sync with central when inserting room tags.
Fixed an issue in the API so that Revit reports the correct version.
Removed the previously deprecated API BasicFileInfo.SavedInVersion.
Provided a more informative error dialog when a Revit model fails to open.
Improved stability when opening a model.
P&ID Modeler:
Fixed an issue preventing refresh of P&ID drawing when switching projects.
Fixed a worksharing issue resulting in elements checked out by other users potentially being incorrectly reported as mapped.
Fixed a worksharing issue resulting in incorrect mapping between piping model elements and the P&ID part list.
Fixed a localization issue with the P&ID project list order in the project selection dialog.
Fixed a localization issue with the display of the project name in the P&ID Modeler browser.
Fix a memory leak issue in P&ID Modeler when starting Revit
Parameters:
Improved stability for family behavior when copy-pasting families between Revit models.
Part Elements:
Added a warning message for cases when the associated part couldn't be created for a certain geometry.
Improved performance when editing parts divisions or merges.
Fixed an issue with the location of the division line for parts when moving or copying the original element.
Added shortcut keys for Modify Parts tools in the ribbon.
Pipe:
Fixed an issue that could cause Revit instability when creating a mechanical equipment set.
Fixed an issue that caused a single line pipe drop to not display a gap.
Print:
Fixed an issue where masking regions in nested generic annotations did not mask in a vector print.
Fixed an issue where unwanted hatching created by a view filter at a ductwork drop symbol appeared when printing, but not on the screen.
Fixed an issue where symbols print differently when nested in a family than when they are placed directly in the model.
Fixed an issue where opaque text in nested generic annotations did not mask in a vector print.
Fixed an issue where Background Room Color Fill with a non-solid fill pattern would incorrectly overlap cut walls when printing in vector mode.
Fixed an issue that resulted in forced raster printing when a Coordination Model was in the model, but was unloaded or not visible.
Fixed an issue with too many hidden lines printing from structural views with Hidden Lines set to By Category.
Fixed an issue where foreground color schemes would incorrectly mask stair path arrowheads when printing in vector mode.
Fixed an issue in structural discipline views to allow stick representation for structural framing to display and print in a coarse detail level view with Display Hidden Lines set to All or None.
Fixed an issue where hidden lines in mechanical families would incorrectly print a solid line in the model.
Fixed an issue that caused lines that were not hidden to print and display when Hidden Lines was set to All.
Fixed an Issue where detail lines were incorrectly creating hidden lines only when printing.
Project Browser:
Removed the Type from the set of parameters available for filtering in the Project Browser since view type name is unique only within one family.
Fixed an issue that resulted in revised type names in the Project Browser not being updated after renaming has been cancelled.
Fixed an issue in which typing a search string in the Project Browser did not work.
Fixed an issue with filtering in the Project Browser for the not equal to condition.
Added the ability to press Shift-F10 to access the context menu in the Project Browser.
Properties Palette:
Fixed an issue in which contextual tabs could show as being in edit mode when Revit was not in an edit mode.
Improved stability when making edits in the Properties palette.
Fixed an issue in which a warning caused the Type Properties dialog to allow incorrect interactions in the Properties palette.
Railing:
Fixed a problem with certain railings that prevented file upgrade due to unexpected geometry.
Improved stability when trying to edit the stair railing path.
Fixed an issue with missing or incorrectly-positioned balusters in a saved group.
Enabled the display of baluster names in the Edit Baluster Placement dialog when the profile has been incorrectly switched to a different category.
Updated the behavior of railing balusters that have their Top reference set to Top Rail Element so that they are only trimmed to the Top Rail Element if the baluster's Top Offset property is equal to zero.
Fixed an issue with incorrectly displayed railings inside a group when opening the group for editing.
Raster Images:
Fixed an issue where raster images could be set to a negative width through the API.
Fixed an issue where the Insert Image command was available in a Graphical Column Schedule view, but an image could not be placed.
Improved stability when importing an invalid image file.
Improved error messaging when entering very large values for image size parameters.
Fixed an issue with ambient shadows extending beyond the crop on high resolution export.
Reinforcement:
Improved stability when placing a Multi-Rebar Annotation in a locked 3D view.
Fixed an issue where bars in a standard rebar set would shift unexpectedly when constrained to the corners of a stirrup bar.
Improved stability when overriding the Rounding Project Settings.
Fixed an issue when updating the wire type name in a schedule when edited in the Properties palette.
Improved stability when modifying a segment that results in a length that is less than twice the bend diameter.
Fixed an issue that caused all the faces in a free form rebar constraint to be lost if one of the faces was deleted.
Fixed an issue where a free form rebar set displayed as solid would disappear if the length of one of the bar segments is near zero.
Fixed an issue where adding hooks to a free form rebar matched to a rebar shape, would flip one of the hooks when deleting the 00 shape in the model.
Fixed an issue in which the column size of the Reinforcement Numbers dialog truncated titles in some languages.
Improved stability when removing the area or path reinforcement system that had an incompatible hook type assigned to any of the bars in the system.
Fixed an issue that resulted in rebar with a hook on the end having missing geometry in section or plan views.
Fixed an issue where rebar placed in some stairs created with Revit 2018 or earlier would shift when moving the host.
Fixed an issue where ungrouping standard and stirrup/tie rebar would adjust the bar segment lengths unexpectedly.
Fixed an issue where the cover reference could not be selected when editing rebar constraints if the host was joined to another structural element.
Improved stability when deleting a hook type used by a rebar placed in the project.
Improved the stability when adjusting the geometry of rebar using the segment handles.
Fixed an issue where some of the bars in a free form rebar set displayed as solid are not visible.
Fixed an issue where dimensions placed on the bars in a rebar set would not be shown if the first bar in the set was hidden.
Fixed an issue in which formulas referencing the bar segment lengths of rebar in a varying rebar set would only use the values for the first bar in the set.
Fixed an issue where placement of a varying rebar set is restarted when changing the options in the Properties palette or the ribbon.
Rendering:
Fixed an issue where Render to Cloud fails due to elements in certain Revit linked files.
Improved the quality of the rendering result when the artificial lighting resource Shape is set to Line, and Distribution is set to Spherical.
Fixed an issue in which a lighting fixture may be turned off when rendering.
Fixed an issue with rendering lighting elements.
Revit Cloud Worksharing:
Enhanced Personal Accelerator operation and included necessary security updates.
Fixed an issue where the title of the Collaboration dialog could not be localized.
Fixed an issue where the Linking dialog would display a communication error if one model could not be opened.
Fixed an issue where text in the Manage Cloud Models dialog could not be localized.
Fixed an issue where the link in a host document was not updated when the corresponding workset was opened.
Fixed an issue where the title of the Manage Cloud Models dialog could not be localized.
Fixed an issue where non-workshared cloud models failed to link when using Specify worksets.
Fixed an issue that blocked Sync with Central after deleting certain elements.
Fixed an issue where BIM 360 Document Management cloud models with legacy BIM 360 Team links failed to publish.
Revit Home:
Fixed an issue where the position of an icon in Revit Home is changed when the recent files page is disabled.
Fixed an issue where Revit Home does not display when not connected to the internet.
Improved an error message that displays when you do not have edit permission when accessing a BIM 360 project.
Improved the message when there is only one inactive account under BIM 360 Document.
Fixed an issue in which the Recent Files page does not update after opening several project templates or family templates.
Fixed an issue that caused a long delay when clicking the File Menu in the recent file list.
Room Area Report:
Improved the room area report so that it works with multiple views selected and one of the views has a slash in its name.
Room, Area and Spaces:
Improved regeneration performance for models that have several schedules showing room related parameters.
Added a warning message when using the Space Naming tool and edits to the model are not possible.
Schedules:
Improved stability when editing a schedule.
Scope Box:
Fixed an issue to ensure that when applying a selection box to a 3D view, the scope box and section box are adjusted correctly.
Improved the behavior in 3D views to ensure the crop region is always enabled in a 3D view if a scope box is applied to the view.
Section/Elevation:
Fixed an issue when rotating an elevation marker 180 degrees that could cause inconsistent results.
Improved stability when selecting or activating a viewport on a sheet that contains very large extents.
Shaft Openings:
Fixed an issue in which a shaft opening does not cut the slope roof.
Shared Coordinates:
Remove the previously deprecated API ProjectLocation.IsProjectLocationNameUnique
Site:
Improved stability when moving topography.
Sketching:
Improved stability when editing a sweep sketch in some models.
Space Engineering Parameters:
Fixed an issue that caused the Area and Computation Volume project standard workset to be checked out when creating spaces with the Place Space Automatically tool.
Stair:
Fixed the issue that stair tread and riser numbers with negative values do not display in Odd Display Rule.
Structural Connections:
Fixed an issue so that structural connections correctly move when they are being edited.
Fixed an issue related with the anchor's length project units assignment.
Fixed an issue that prevented Tag All from working for elements of a connection in views using Hidden Lines visual style.
Fixed an issue that triggered a misplacement of bolts when copy pasting broken steel connections from one model to another.
Fixed an issue with the transformation of face-based cuts to steel modifiers that occurs when upgrading the project.
Improved the verification of the concrete resistance, under the base plate, so that it is calculated using the value of the concrete capable stress with the correct units.
Fixed an issue that blocked the generation of the base plate connections code check reports, for the Japanese and Russian install languages.
Fixed an issue that occurred when using CTRL+C and CTRL+V in 3D on a truss that had steel connections.
Removed a warning message that appeared when changing a steel column to a concrete section if that column had a custom connection applied to it.
Improved the Code Checking report so that the Concrete Bearing verification is calculated using the Concrete Ultimate Strength value in the correct units.
Improved the behavior when creating the steel fabrication shape for the UPN structural framing family.
Improved the behavior for Member loads from Robot analysis results or from the Member Forces menu in Revit, so that they appear the Steel Connection's Code Checking dialog.
Improved the behavior after the Connection Properties dialog is closed.
Fixed an issue that resulted in a larger than normal viewport when the view was placed on a sheet if connections without visible elements were left outside the cropped view.
Improve stability when pasting a plate while in edit sketch mode.
Fixed an issue that could occur when creating steel fabrication elements in a model after cancelling upgrade in another model, during the same Revit session.
Added a missing warning that displays when creating a connection on a beam with independent justification.
Improved the performance on opening the Filter dialog in a Revit model that contains many steel fabrication elements.
Fixed an issue that caused Undo to work improperly when used to restore steel connections that were invalidated by an input beam movement.
Fixed an issue related to the steel fabrication beam representation in Medium detail level.
Fixed an issue that could occur when setting the Base Level equal to the Top Level for a steel column that had steel fabrication.
Removed the Editable only option from the Options bar for the steel connection creation operation.
Fixed an issue that caused the modifier created on a steel fabrication beam to be mirrored in the wrong direction.
Improved stability of dimensions between steel detailing elements
Structural Families:
Fixed an issue that caused the inability to associate a dimension with a structural section parameter through the API.
Switch Systems:
Fixed an issue that caused a switch system to be removed from a lighting fixture when removing the fixture from its circuit.
Tags:
Improved stability when editing element parameters.
Fixed an issue so that the Select All button for annotations in a Design Option is shown as inactive since annotations cannot exist in a Design Options.
Improved stability when using the Tag All Not Tagged command in some models.
Templates:
Fixed a display issue in the 3D view of perspective mode in DefaultFRAFRA.rte.
Transfer Project Standards:
Updated terminology in the Transfer Project Standards dialog to clarify that Elevation Tag Types, not Elevation Types, are being transferred.
Fixed an issue to allow rendering settings to successfully transfer using Transfer Project Standards.
Truss:
Fixed an issue that triggered an incorrect reset of the truss position when using Edit Profile and validating the edit without making any changes.
Fixed an issue that caused the truss Reset Profile button to be unavailable after using Undo.
Fixed an issue where the position of some truss elements changed when the truss was placed between two beams.
Undo/Redo:
Fixed an issue where the Undo wouldn't always properly restore the state of the leaders contained inside of families if they were updated.
Units:
Corrected the conversion factor for units of rotational line spring coefficient.
Fixed the conversion factor between permeability units.
Corrected the conversion factors of metric units related to the standard acceleration due to Earth's gravity.
Fixed an issue in which a user was able to manipulate not-owned units elements in a worksharing environment.
Upgrade:
Fixed a typo in the Upgrade dialog when opening a model.
Fixed an issue where the Upgrade dialog reports an incorrect release for a file being upgraded.
Improved stability when user-specified names for items contain special characters such as "&."
User Interface:
Fixed an issue that could cause instability in Revit when performing unrelated tasks out of order in the file navigation dialog.
Fixed an issue that caused the render progress percentage not to be scaled as system DPI.
Fixed an issue that prevented the Apply button to show changes in views after adjusting the line weights settings.
Fixed an issue that caused Revit instability when opening some models.
Fixed an issue that caused text size to be too large and not to display completely in some dialogs.
Fixed an issue with the behavior of the scroll bar for views.
Fixed a globalization issue that caused custom buttons on the Quick Access Toolbar to translate incorrectly.
Fixed a globalization issue that caused parts of the File menu to translate incorrectly.
View Filters:
Improved stability when editing a selection set and attempting to use the delete command.
Improved display legibility for the Filters dialog in non-English languages.
Fixed an issue with the placement of text in the Filter Rules dialog where the text size is greater than 175%.
Removed the previously deprecated APIs in the ParameterFilterElement class.
View:
Fixed an issue with pre-highlight lines that are flipped in perspective views when parts of them are located behind the camera.
Improved stability when placing a camera view and then activating another view tab.
Improved stability of duplicate with detailing for a view containing attached detail groups.
Fixed an issue that caused instability when inserting views from a file.
Fixed an issue to ensure the view range of a view is reset when exiting a model that has a temporary view template applied to the view.
View References:
Fixed an issue so that its now possible for multiple view references to be updated at the same time.
View Templates:
Fixed an issue so that when a model is reopened after being closed while in Temporary View Template mode, the view's properties are reset back to the view's default settings, instead of keeping the settings of the Temporary View Template mode.
Improved Temporary View Properties view mode to allow changing the design option while in the mode.
Improved stability when applying a view template to views.
Fixed an issue to ensure that user-created project parameters are correctly applied in view templates.
Fixed an issue causing inconsistent behavior when accessing Light groups for editing from within view filters so that the behavior now matches the behavior of accessing Light groups from outside of view filters.
ViewCube Navigation:
Improved stability when using the ViewCube context menu.
Corrected a repeated hotkey in the ViewCube context menu.
Visibility Graphics:
Fixed a globalization issue that caused parts of the Visibility Graphics dialog to translate incorrectly.
Fixed an issue that could cause a keyboard shortcut to jump to the wrong entry in the Visibilty/Graphic Overrides dialog.
Walkthrough:
Improved stability when editing Walkthrough View frames in a workshared environment.
Wall:
Fixed an issue while splitting an arc wall by a vertical line that caused some cutouts for doors, windows, or other inserts in the wall to fail.
Improved stability when clicking OK in the Edit Wall Structure dialog.
Fixed an issue in which the connected level selection is not maintained when creating a structural wall.
Improved stability when editing the curved compound stacked wall, especially when the stacked wall doesn't have any sub-walls.
Worksharing:
Improved stability of Sync with Central when elements are included in background processes.
Improved stability when creating a new local file while another user is Syncing with Central.
Added the ability to check out elements after creating a new local file from a restored central model.

New in Autodesk Revit 2018 Build 18.0.0.420 (Nov 1, 2017)

Create:
Change MEP fabrication service
Change MEP fabrication part sizes
Override filter colors for fabrication parts
New Precast content for beams, columns, slabs, and foundations.
Rebar content update for France and Germany
Autodesk Revit 2018.1 Content for architecture and structure (2018.1)
Railings: sketch editing on the host level (2018.1)
Multi-point routing for sloped fabrication piping (2018.1)
Holes in duct developments for branches/taps export from Revit to CAMduct (2018.1)
Free form rebar (2018.1)
Multistory stairs
Schedule model groups and Revit links
Custom space and building types
Control outdoor air requirements
Control a circuit pathway
Optimize:
Analytical pipe connections
Closed loop hydronic piping analysis
Pipe flow and pressure drop compute in the background
Connect:
Reference files in BIM360 Team through Autodesk Drive
P&ID Modeler
Improved fidelity of FormIt imports (2018.1)
Precast parts and assemblies (2018.1)
Position model with geo-referencing
Use NWD coordination models
Rebar placement in imported concrete elements
Custom framing elements
Modernize:
Improved Fill Patterns dialog
Updated graphics and hardware options (2018.1)
Graphical rebar constraints in 3D Views
Create reference plane subcategories from the pull-down
Progress indicators for Synchronize with Central
Parameter tooltips
Over 100 new steel connections
Strengthen:
Expand/collapse the Project Browser
Remember where you loaded families from last time
Remember column widths in the Family Editor
Browser organization for schedules (2018.1)
Quick input of special characters
Tag imported 3D shapes
Dimension to cut edges of imported 3D shapes
Add MEP connectors to imported 3D shapes
Verification of family constraints
Automate:
Dynamo Player supports input for scripts (2018.1)
Core:
Expand/collapse the Project Browser with right-click commands: Quickly expand or collapse all or part of the Project Browser using new right-click commands. For example, right-click Views and select Expand Selected to expand the Project Browser to list all views. Or right-click any top-level node or white space in the browser and select Collapse All to quickly collapse all nodes in the Project Browser. These commands allow you to more quickly navigate the Project Browser to locate the items you want to work on. See Project Browser.
Streamlined family loading: To streamline the process of loading families into the current model, Revit remembers the last folder from which you loaded families during the current session. When you want to load another family into the model, the Load Family dialog points to the most recently accessed folder. This improvement means you don't need to navigate to the same location each time, thus streamlining your workflow and improving productivity.
Remember column widths in the Family Editor: To better support customization of content in the Family Editor, Revit remembers column sizing in the Family Types dialog for the current session. This regression appeared in the 2016 release, and the functionality has now been restored. Resize the width of the Formula column and other columns in the dialog to make changes to the formulas and other parameters. Then test the content. When you return to the Family Types dialog to make further tweaks, the columns retain the sizing that you specified earlier.
Fill Patterns dialog: The dialog is reorganized and improved to streamline the workflow and achieve consistency with other areas of the user interface. A new Search field allows you to quickly locate patterns. And if you need to rescale imported patterns, you can do so without re-importing the file. See Create a Simple Fill Pattern, Edit a Fill Pattern, and Custom Pattern Files.
Section Box shape control: The Section Box shape control has been improved so you can more reliably adjust a section box.
Autodesk Drive: You can use Autodesk Drive to reference files in BIM Team. Team members can use the BIM Team Autodesk Drive to link to CAD files, keynote tables, assembly code files, and RVT files as cloud links. The BIM Team Autodesk Drive will sync all file types, including those not supported in Revit. Autodesk Drive does not support hosting worksharing enabled central models. See Autodesk Drive Help.
Browser organization for schedules (2018.1): To support the way you work, customize the Project Browser to filter, group, and sort schedules, in addition to views and sheets. Define up to 3 levels of filtering, 6 levels of grouping, and sorting criteria for schedules/quantities based on their properties or custom parameters. See Organizing the Project Browser.
Updated graphics and hardware options (2018.1): The Graphics tab of the Options dialog is reorganized to clarify the impact of graphics-related options. A new Hardware tab provides more meaningful information about your hardware setup. See Options Dialog: Graphics Tab and Options Dialog: Hardware Tab.
Dynamo Player supports input for scripts (2018.1): Expand the power of scripts by giving Revit designers and engineers the ability to provide values for Dynamo scripts within the Dynamo Player interface. Revit users can quickly change input values to adjust a script for the current model. See About Requiring Input for Dynamo Scripts and Provide Input for a Script in Dynamo Player.
Schedule model groups and RVT links: To better document models, you can select Model Groups or RVT Links as categories when creating a schedule. See Workflow: Select Fields for a Schedule.
Add parameters to model groups, RVT links, and schedules: To support organizing additional data in models, you can create custom parameters for one of these new categories from the Project Parameters dialog. Custom parameters can also be associated to global parameters where applicable. See Create Project Parameters.
Subcategories for reference planes: Use the Subcategory tool to add a subcategory to a reference plane. See Create Reference Plane Subcategories.
Symbols in text notes: Enhance annotations by adding symbols and special characters to text notes without interrupting your workflow. Select from a list of commonly used symbols on a context menu, or type a key sequence that includes the symbol's Unicode decimal value. For infrequently used symbols, access the Windows® Character Map® from within Revit, and copy and paste symbols into the text note. See Add a Symbol or Special Character to a Text Note.
Rich text in labels: To produce more consistent drawings in documentation, labels now use rich text format to better match text notes.
File tab: The File tab replaces the application menu. See File tab.
Verification of family constraints: To help ensure the reliability of families within your models, Revit now checks the status of constraints when you open a family in the Family Editor. If Revit detects potential issues, a dialog offers further information. See Constrain Family Geometry.
Imported 3D shapes: Imported 3D shape elements can be tagged. The cut edges of 3D shapes can be dimensioned. 3D shapes imported into a family can have MEP connectors placed on the geometry.
Tag All Not Tagged: The Tag All Not Tagged dialog has been modified to be more consistent with the user interface.
Parameter Tooltips: Tooltip information has been added to instance and type properties for a number of elements.
Quick Access Toolbar: The Print command has been added to the default Quick Access Toolbar.
Photographic exposure: Tone mapping for materials was enhanced to improve photographic exposures when rendering.
Use geographic data from a linked DWG: Architects and civil engineers often need to maintain consistent geographic location (geolocation) data between models that are managed using multiple BIM products. To simplify this workflow, when you link a DWG file to a Revit model, you can import grid coordinates from the linked file for use in the model. See Linking DWG Files with Grid Coordinates.
Architecture:
New family content (2018.1): To support the work of architects, new content is available for the following Revit family types: windows, furniture systems, and domestic appliances. For details and to download the content, see Autodesk Revit 2018.1 Content.
FormIt Converter (2018.1): See FormIt Import.
Materials applied to elements in FormIt will transfer to Revit when importing.
Model fidelity is improved when importing a FormIt model into Revit.
Railings:
The sketch of a railing that has been re-hosted to an element will be displayed on the level of the host when editing. (2018.1)
The process for modifying a railing is improved to provide access to the type properties for the top rail and handrails (continuous rails) directly from the railing Type Properties dialog. You can also view your changes in the Preview pane of the railing Type Properties. See Modify a Railing.
Sketched railings can now be hosted to a topographic surface. This functionality allows you to use the Railing tool to model elements such as a fence or road barriers. See Create a Railing by Sketching.
Railings hosted to a stair now use improved attachment behavior. You can control the start points and endpoints of railings to match your design intent. See Modify a Railing.
Note: For existing models containing railings that are hosted to stairs, when the model is upgraded from a previous version, the railings must be un-hosted and re-hosted to the stairs to enable new controls and behaviors. See upgrade information.
Railings hosted to multistory stairs will be grouped with the stairs and can be edited as a group.
Multistory stairs: You can create a multistory stair from a component-based stair by selecting the building levels. Multistory stairs automatically adjust if level heights change. See Multistory Stairs and upgrade information for existing multistory stairs. You can tag individual stair elements in the multistory stair.
Coordination models: To streamline coordination with models created using other software, link a file from Navisworks® and use it as an underlay for a Revit model. This feature provides context for the design, allowing you to compare your Revit model to a non-Revit model for coordination purposes. See Coordination Models.
Improved support for CAD imports: Revit has enhanced its support for CAD imports. Specifically, the import process is now more tolerant of tiny details, which in previous releases would generate error messages. Many of these CAD files can now be imported into the model without problems.
MEP:
MEP fabrication modeling:
Override filter colors for fabrication parts: Use the Visibility/Graphics dialog to override the graphic display and control the visibility of fabrication parts. See About Controlling Visibility and Graphic Display of Elements Using Filters.
Change MEP fabrication service: When you change the service of an MEP Fabrication system connected to another system, you can specify a service that use a different service template. See Change the Service for Fabrication Parts in Revit.
Change MEP fabrication part sizes: You can change the size of parts in an MEP Fabrication system connected to another system that uses a different service template. See Change the Size of Fabrication Parts in Revit.
Multi-point routing for sloped piping (2018.1): The Multi-point routing tool for MEP fabrication now supports the creation of sloped piping. See Use the Multi-Point Routing Tool.
Print fabrication reports (2018.1): You can now print fabrication reports from within Revit. See Print Fabrication Reports from Revit.
Holes in duct developments for branches/taps (2018.1): When you use the Revit Extension for Fabrication, information related to holes in duct developments for branches/taps can now exported to the MAJ file. Holes for Dynamic Branches must be enabled in the fabrication database loaded for the Revit model you are exporting from. See Pattern Options in the Autodesk Fabrication User's Guide.
Sloped pipe: You can use the placement tools to model sloped pipe in a fabrication model. See Tools for Placing Fabrication Parts in Revit.
P&ID Modeler for Revit: Model piping faster and more efficiently using P&IDs from a Plant 3D Collaboration project directly within Revit. See P&ID Modeler.
Direction arrows for MEP connectors: When you use the Connect Into tool or select connectors when placing analytical pipe connections, connector arrows on mechanical equipment now display flow direction.
Flow and pressure drop calculations for hydronic piping networks:
Analytical pipe connections: To calculate flow and pressure drop in a piping network before physical connections have been made, you can add an analytical connection between mechanical equipment and piping. See Add Analytical Pipe Connections.
Flow and pressure drop calculations: To improve performance, Revit can perform flow and pressure drop calculations for hydronic closed loop networks as a background process. Use the Mechanical Settings dialog to enable the new method. See Specify Calculation and Background Processes.
User definable building and space types:
Building and space types: You can create, duplicate, rename, or delete building and space types. See Specify Default Building Type Settings and Specify Default Space Type Settings.
Export to gbXML: The building/space type name is now exported into the gbXML building/space type Description. In addition, you can export custom space types to gbXML. See Export to gbXML Using a Custom Space Type.
Outdoor air input parameters for building and space types: For each building and space type, you can specify the Outdoor Air per Person, Outdoor Air per Area, Air Changes per Hour, and Outdoor Air Method. See Outdoor Air Information for Zones.
Edit circuit path: You can edit the path for an electrical circuit so that it will reflect an intended design pathway. Voltage drop calculations are calculated based on the actual circuit path length. See Editing a Circuit Path.
Structure:
Rebar Content Update for France and Germany: New French and German rebar shapes have been added to the Library, to enhance rebar modelling. Among the French rebar shapes, we have also included the ones according to French code NF P 02 016:1993. The new content can be downloaded from the Autodesk Knowledge Network.
New Precast Content: New Precast families for beams, columns, slabs, and foundations are available. The extended range of parameters that control their geometry allow for faster and more precise modelling of Precast concrete structures. The German version is based on Fachvereinigung Deutscher Betonfertigteilbau specifications. New content can be downloaded from the Autodesk Knowledge Network.
New family content (2018.1): To support the work of structural designers, new content is available for the following Revit family types: structural steel column and framing shapes, structural steel families for Steel Connections, updated bolt spacing values, and structural steel shapes. For details and to download the content, see Autodesk Revit 2018.1 Content.
Precast parts and assemblies (2018.1): The Structural Precast for Revit is a powerful BIM-centric offering for modeling and detailing precast planar elements that improves productivity for engineers, detailers and fabricators. It will be available soon at the Autodesk App Store. See Structural Precast for Revit.
Free form rebar (2018.1): You can now model and detail reinforcement, either planar or 3D, in complex civil structural elements or challenging architectural models. See Free Form Rebar.
Additional steel connections: The Steel Connections for Revit add-in has added over 100 new connections for steel detailing. See Structural Connection Types Delivered by the Add-in.
Steel connections to support custom framing families: To better integrate structural connections, Revit now analyzes custom framing elements and generates structural section geometry parameters for the element. Steel connections are then more easily implemented with in-house framing elements. See About Standard Structural Steel Framing Families.
Steel element priority in a connection: Specify primary elements and the order of secondary elements within a steel connection. See Change the Order of Connected Elements.
Structural section geometry properties: The Type Properties dialog and the Family Types dialog now group parameters used to create fabrication geometry for structural framing elements. Additional parameters were also added to better define structural section shapes and help analyze custom framing elements when placing connections. See Hot Rolled Steel Section Shape Dimensions.
Rebar placement in free form concrete objects: You can now place rebar in concrete elements with complex geometry such as curved piers and decks.
Varying rebar distribution improvements: To enhance productivity and detailing intent, varying rebar sets can now distribute along curved surfaces, including free form objects. See Place a Varying Rebar Set.
Rebar placement in imported concrete elements: You can now reinforce imported concrete elements from SAT files or InfraWorks. See About Importing 3D Shapes.
Graphical rebar constraints in 3D Views: The graphical rebar constraint editor is now available in 3D views. Use in canvas tools for enhanced and accurate rebar placement. See Edit Rebar Constraint Behavior in a Host.
Collaboration for Revit:
Select more than one set to publish (2018.1): Before you publish models to the cloud, use the Publish Settings dialog to select more than one set of views and sheets to publish. See Select Views and Sheets to Publish.
Collaboration for Revit installs with Revit: Collaboration for Revit is now installed with Revit. As a result, you can use tools like Publish Settings with non-cloud workshared models. See Select Views and Sheets to Publish.
Reliability: Publishing a Collaboration for Revit model is now more reliable.
2017 Subscription Features Now Available to Users of Revit 2018
Most new features and enhancements that were made available to Autodesk subscribers in 2017 updates are now available to users of Revit 2018.
Note: Some of the 2017 update enhancements apply only to students and Autodesk subscribers.

New in Autodesk Revit 2017 Build 17.0.416.0 (Jun 8, 2016)

Visualization
Depth cueing: Depth cueing (available in architectural views and coordination views) allows you to better visualize your elevation and section views. This graphic display feature uses gradient presentation to indicate the elements that are farthest away and the elements that are closest to the front of the view. See About Depth Cueing and Define Depth Cueing.
Visibility of point clouds: After importing one or more point clouds into the model, you can now control the visibility of individual scan locations and scan regions in each view. This feature allows you to hide point cloud information that is not important or relevant in a particular view. It also helps to improve performance when working in the model. See Visibility of Point Clouds.
Rendering:
Autodesk Raytracer is now used for all rendering functions. See About Rendering with Autodesk Raytracer. You no longer need to select a rendering engine. See Workflow: Render Settings.
When you export a walkthrough, if Visual Style is set to Rendering, the Autodesk Raytracer rendering settings specified for the walkthrough view are used for export. See Export a Walkthrough.
Autodesk Raytracer rendering settings are now saved with the view properties. See Change Render Settings for a View.
Autodesk Raytracer is used when you render a material preview. You can select draft or production quality. See Change the Appearance of a Material.
When you upgrade a model, rendering settings that were specified for the NVIDIA mental ray engine are mapped to the appropriate settings for Autodesk Raytracer. See Upgrade Mapping for Render Settings.
A new style is available for Background in the Rendering dialog. Select Transparent to create a transparent background that can be preserved when exporting the image as a PNG or TIFF format. See Specify the Background for a Rendered Image.
Analysis
Energy Analysis: To simplify the settings required to generate an energy analytical model, the following changes have been made:
Energy Settings: This dialog is redesigned so that you only need to specify a location for the model. All other parameters use intelligent defaults to provide optimal analysis with minimal input. See Energy Settings Dialog.
Advanced Energy Settings: Many parameters that were formerly in the Energy Settings dialog have moved to the Advanced Energy Settings dialog. Adjust these settings after performing an initial analysis when you understand their effects and want to refine the analysis. See Advanced Energy Settings Dialog.
Many parameters related to energy analysis have been renamed: On the Energy Settings dialog, Analysis Mode is now Mode, Core Offset is now Perimeter Zone Depth, and Divide Perimeter Zones is now Perimeter Zone Division. On the Advanced Energy Settings dialog, Conceptual Constructions is now Conceptual Types, Building Construction is now Schematic Types, and Include Thermal Properties is now Detailed Elements.
Help links from the Energy Settings dialog and the Advanced Energy Settings dialog provide direct access to descriptions of the parameters.
During energy analysis, thermal properties are defined for building materials based on the following hierarchy:
Conceptual types are applied by default to all conceptual masses and building elements.
More specific schematic types can override individual conceptual types.
When the Detailed Elements parameter is enabled, thermal properties defined for room-bounding elements override schematic types and conceptual types.
The Export Category parameter in the Advanced Energy Settings dialog no longer relates to thermal properties used during energy analysis. See Advanced Energy Settings Dialog.
Export to gbXML: The Export to gbXML tool now allows you to choose whether to export the energy analytical model created using energy settings or the model using volumes based on rooms or spaces. See Exporting to gbXML.
Additional Enhancements
Hosted Railings: You can now sketch railings onto the top faces of floors, slabs, slab edges, walls, or roofs. Balusters and railings adjust to the slope of irregular surfaces. See Create a Railing by Sketching.
Important: After upgrade, review all views to verify any changes to your railings. See Upgrade Information.
Display of walls: To improve performance so that views open and update faster, Revit regenerates walls only for those visible in the drawing area. In addition, if a wall appears very small in the drawing area, it displays as simplified lines, regardless of the detail level assigned to the view.
Export to FBX: When exporting a 3D model view to FBX, select the correct format to ensure import compatibility: FBX Files for import in 2016+ version products, or FBX 2015 and Previous for import in 2015 and earlier version products. See Export to FBX.
FormIt 360 Converter: This add-in is now installed with Revit and available on the Add-Ins tab. Use it to convert FormIt 360 files for use with Revit, and Revit files for use with FormIt 360. See FormIt 360 Converter.
In-Place elements: Stairs has been added to the list of available family categories for In-Place geometry. You can now create an in-place stair element in the context of a model. See In-Place Elements.
Revit Fabrication
Convert design intent to fabrication parts: You can convert generic, design-intent Revit parts to LOD 400 fabrication parts. See Convert Generic Revit Parts to Fabrication Parts.
Route and Fill: To simplify the process for completing a fabrication model, use the Route and Fill command to step through possible routing solutions. See Fill Gaps in a Revit Fabrication Model.
Quick Connect: To simplify the process for filling a gap between a fitting and a straight, use the Quick Connect command. See Fill Gaps in a Revit Fabrication Model.
Trim/extend: To simply the process for filling a gap between two straights, use the Trim/Extend tool. See Fill Gaps in a Revit Fabrication Model.
Swap fabrication parts: Use the Type Selector to quickly swap fabrication parts. See Modify Fabrication Parts in a Revit Model.
Fabrication parts optimization: To help optimize fabrication ductwork layouts, you can use in-canvas controls to reposition short straight segments and to extend fitting extensions. Additionally, you can review warnings to find fittings that are longer than specification-defined lengths. See Modify Fabrication Parts in a Revit Model.
Hanger bearer position: To avoid clashes in the model, use the hanger controls to modify the length and position of the hanger bearer and its corresponding rod location. See Modify the Position of Hangers in Revit.
Hanger placement: You can place a fabrication hanger on the straight portion of a fitting extension. Hangers can be placed on other hangers to model trapeze conditions or in free space. See Place Hangers in Revit.
Tag fabrication parts: To support workflows for construction documentation for fabrication, additional fabrication parameters are available for tagging fabrication parts. See MEP Fabrication Parts Instance Properties.
Fabrication parameters: To improve tagging, scheduling, and filtering capabilities for MEP fabrication modelling, several parameters are now available for fabrication parts. See MEP Fabrication Parts Instance Properties.
Fabrication family categories: To improve annotation, scheduling, and filtering capabilities for MEP fabrication modelling, family categories have been added for MEP Fabrication Containment, MEP Fabrication Ductwork, MEP Fabrication Hangers, and MEP Fabrication Pipework. See Visibility and Graphic Display in Project Views.
Hidden lines for fabrication parts: To improve documentation, fabrication parts now display hidden lines.
Insulation and lining: To improve documentation, fabrication parts now display separate sub-components for insulation and lining for duct and pipe elements, allowing more control of display properties.
Rise drop symbols: This enhancement supports coordination between fabrication models in Revit and the Autodesk Fabrication products (CADmep, ESTmep, and CAMduct). Rise drop symbols for a fabrication run in Revit are defined in the Autodesk Fabrication products, and are mapped to the rise drop symbols used for duct, piping, and electrical containment systems in Revit. See Rise Drop Symbols for Revit Fabrication Detailing.
Tooltips for fabrication parameters in the Properties palette: To support usability, tooltips provide descriptions for fabrication parameters in the Properties palette. See Tooltips.
Fabrication settings: When you specify a fabrication configuration, you can also specify a fabrication profile. See Specify a Fabrication Configuration and Load Services in Revit.
MEP Fabrication Content for Revit: This fabrication configuration is now available as part of the Revit installation. See About Fabrication Configurations, Profiles, and Services in Revit.
MEP User Interface and Workflow Enhancements
New annotation families: To improve annotation for generic and fabrication parts, several annotation families are now available for tagging ductwork and pipework. (Electrical containment is not currently supported.) You can use tags for offset, elevation, spot elevation, invert elevation (pipework only), set up, and set down to tag generic and fabrication elements. Use the Mechanical Settings dialog to customize the labels for the tags. See About Duct Settings or Specify Pipe Settings.
Electrical settings: You can specify the load calculation method for how Revit sums electrical loads: Sum True Load and Reactive Load, or Sum Apparent Load and True Load. See About Load Calculations. When upgrading a model, Revit uses the Sum True Load and Reactive Load method as the default.
Temperature Difference family parameter type: The Temperature Difference parameter is now available for HVAC, Electrical, and Piping families. See HVAC Family Parameters, Electrical Family Parameters, and Piping Family Parameters.
Calculate pressure drop for taps: To improve workflows when calculating pressure drop in a duct system, you can associate an ASHRAE table for duct tap fittings. See Specify a Pressure Loss Method for Fittings and Accessories for Duct and Pipe.
MEP Performance Improvements
Duplicate marks: To improve performance, the Mark parameter is not populated when placing elements for the following MEP categories: Cable Trays, Cable Tray Fittings, Conduits, Conduit Fittings, Ducts, Duct Fittings, Duct Placeholders, Duct Insulations, Duct Linings, Flex Ducts, Flex Pipes, Pipes, Pipe Fittings, Pipe Placeholders, Pipe Insulations, and Wires.
Volume calculations: To improve performance, Revit performs pipe system volume calculations as a background process. See Customize System Types.
Display of ducts: To improve performance so that views open and update faster, Revit regenerates ductwork only for what is visible in the drawing area. In addition, if duct appears very small in the drawing area, it displays as simplified lines, regardless of the detail level assigned to the view.
Structural Workflow Enhancements
Generic connections: To facilitate the exchange of information between engineers, detailers, and fabricators about a connection between steel framing elements, Revit supports generic steel connections. You can place a generic connection to define the relationship between elements. Use parameters to supply information about the connection, including pictures and links to connection requirements or other information. Generic connections can display in drawings and use colors based on approval and/or code checking status parameters for an easier review/approval workflow. If required, you can later replace generic connections with detailed steel connections created using an add-in. See About Structural Connections and About the Generic Connection.
Steel Connections for Revit: This Autodesk add-in allows you to view detailed structural connector geometry and to modify additional parameters in the Revit modeling environment. See Steel Connections for Revit.
Split columns: To improve workflows and extend usability for fabrication models, the Split Element tool can now split vertical columns at the desired points. See Split Elements.
Structural Design Modeling and Documentation
Column base attachment: The Attach Top/Base command can now attach structural columns to isolated foundations and footings. Adjustments to the foundation height cause the length of the column to adjust accordingly. See Attach a Column.
Structural foundation parameters: To achieve consistency and use more recognizable terminology, several reporting parameters have been renamed or changed for wall foundations, isolated foundations, and slab foundations. See Foundations.
Isolated foundations: The Offset instance parameter is now Height Offset From Level.
Slab foundations: The Default Thickness parameter for filters, tags, and schedules is now Foundation Thickness
Elevation reporting: Top/Bottom Elevations parameters are now measured in relation to the Project Base Point.
Elevation at Top/Bottom Survey: The Elevation at Top/Bottom Survey parameters for filters, tags, and schedules are measured by the shared Survey Point elevation.
New parameters for slab documentation: To improve tagging and scheduling of floors, 2 new parameters allow you to specify the default (total) thickness and core thickness of floor types. Use these parameters for schedules and tagging. When one floor layer is set to "variable" and the sub-element has a variable thickness, the parameters display the value "Varies."
Reinforcement Detailing
Reinforcement connectors: To improve reinforcement modeling and documentation, use reinforcement connectors. Reinforcement connectors are family-based and fully customizable, and each team member can use them according to their needs. Structural engineers can use schematic connectors to define requirements. Detailers can use them to produce shop drawings. Manufacturers can go into full detail, precisely modeling and representing reinforcement connectors to create installation instructions. Rebar connectors interact with the rebar that they connect to, facilitating change management. You can add the connectors to groups, assemblies, and partitions with unique coupler numbering. You can also export connectors to various formats. See About Rebar Couplers.
Bent fabric reinforcement: When placing fabric reinforcement sheets, you can now sketch bent sheets to accommodate different shapes of concrete hosts. You can later edit them to adjust to any change. See Sketch a Bent Fabric Reinforcement Sheet.
Constrained rebar placement: The new graphical constraints manager enhances precise rebar placement. You can place standard rebar shapes that snap to adjacent standard rebar, or you can constrain them to host faces. The user interface highlights each rebar segment that can be constrained, along with available targets. You can modify dimensions to adjust the rebar position. The snap constraint maintains its relationship when you place, move, drag, or copy rebar. See Constrain Standard Rebar.
Graphical rebar constraint editing: To improve the reinforcement workflow, a new in-canvas editor replaces the Rebar Constraints dialog. See Edit Rebar Constraint Behavior in a Host.
Variable rebar distribution: To fit rebar for complex shapes, you can use rebar sets that vary along inclined faces. Documentation is easy with multi-rebar annotations, customizable numbering settings, and accurate schedules that display varying lengths. You can also define inclined rebar sets. See Place a Varying Rebar Set.
Text Notes
The text editor has been enhanced to add text notes directly in canvas. During editing, text displays in the correct font and style. Other text editor improvements include the following:
For quick access, new contextual text editing tools are available in the ribbon.
All text is visible while editing.
Text wraps, scales, and scrolls as you expect.
You can zoom and pan while editing a text note. The zoom scale does not affect text wrapping.
You can enter unnumbered or non-bulleted text in lists by pressing Shift+Enter. See Create a List in a Text Note.
You can specify the text editor to display an opaque background and a border when editing a note. This option allows you to better see the text while typing over complex drawings. See Edit a Text Note.
Additional improvements for text notes
Improved export of text to DWF, DWG, and DGN files: Enhancements improve the fidelity of character size, location, overrides, font, spacing, line spacing, numbering, tabs, indenting, and other text related properties. See Text and Fonts for DWG/DXF Export and Text and Fonts for DGN Export.
Multilevel lists: Lists now allow the creation of hierarchies within an ordered list of paragraphs. You can modify multilevel lists by indenting and changing increments. See Create a List in a Text Note.
Text orientation when rotating Project North: When you use the Rotate Project North tool, a new option allows you to specify whether text notes should rotate with the model or maintain their current orientation in the view. See Rotate Project North.

New in Autodesk Revit 2016 R2 (Jun 8, 2016)

Multi-Disciplinary Enhancements
Global parameters: Global parameters bring the power of parametric families into the project environment to better capture design intent. You can create global parameters that are specific to a single project file but that are not assigned to categories. Use global parameters to drive the value of a dimension or a constraint, associate to an element instance property to drive its value, or report the value of a dimension, so the value can be used in the equations of other global parameters. See Global Parameters.
Cancel print/export: When you print or export multiple views and sheets, click Cancel to cancel the entire operation. In earlier releases, the Cancel button allowed you to cancel only one view or sheet at a time. Now the Cancel button cancels the print jobs or export operations of all selected views and sheets.
Performance:
Occlusion culling: To improve performance and reduce the amount of time required to open views, the Graphics tab of the Options dialog offers a new setting: Draw visible elements only. This setting is enabled by default. Performance improvements are most noticeable for 3D views that contain many obscured elements. See Options Dialog: Graphics Tab.
Export to DWF/DWFx: To significantly reduce processing time when exporting views/sheets to multiple DWF or DWFx files, the software now uses several RevitWorker processes. See About Performance When Exporting Multiple Files to DWF.
Color fills: To improve performance, color fills are completed as a background process so you can continue working in the model while the views update. See Color Schemes.
Background processes: To see a list of the Revit processes that are running in the background, use the status bar.
Object Styles: In the Object Styles dialog, you can now select and delete multiple subcategories at once. Press and hold the Ctrl key or Shift key while selecting subcategories, and click Delete. See Object Styles.
Family Editor:
Family visibility preview: In the Family Editor, you can view improved representations of family geometry with respect to levels of detail, visibility parameter settings, and view type. Create, test and edit the geometry of a family without having to repeatedly load it into a project. See Preview Family Geometry in the Family Editor.
Filter voids and solids: You can specifically isolate void and solid geometry when using the Filter tool in the Family Editor. See Select Elements Using a Filter.
Revisions: Additional information is available for revisions to make it easier to see exactly how the revision number will be generated, and to select revisions to include in a revision schedule.
Sheet Issues/Revisions dialog: When Numbering is set to Per Project, a new Revision Number column displays the actual revision number that will be generated based on the Sequence, Numbering scheme, and Numbering options. This column does not display if Numbering is set to Per Sheet. See About Numbering for Revisions.
Revisions on Sheet dialog: A Revision column now displays the revision sequence information along with the revision description. A new Date column displays the revision date. See Specify the Revisions to Include in a Revision Schedule.
Revit links: These changes improve workflow and productivity when using Revit links in the host model.
A new positioning option, Auto - Project Base Point to Project Base Point, is available when inserting Revit links. This option positions the linked file using the model's Project Base Point as the insertion point, and aligns it to the Project Base Point in the host model. See Import and Link Options.
Two options are available to reposition a Revit link after it has been inserted: Reposition to Project Base Point, and Reposition to Internal Origin. See Reposition a Revit Link.
When you are working in a local copy of a workshared model, the Unload command offers 2 options:
UnloadFor all users: The Revit link is unloaded for all users in the model (existing behavior).
UnloadFor me: The Revit link is unloaded for the current user only. This command works like a permanent override and remains set for the current user for that RVT link until it is cleared. This option allows you to unload and keep Revit links unloaded for portions of the model you aren't working on without affecting other team members. Unloading Revit links may also increase performance and memory usage.
To clear the override, right-click the link name in the Project Browser, and click UnloadClear my override.
See Tools to Manage Links and Project Browser (scroll to see the Revit Links table).
Worksharing: When you are opening a workshared model and you select the Detach from Central option, the default name of the open model is now the original model name with "_detached" appended (instead of a blank file name). When saving the model, you can specify a name or use the default. See Open Workshared Files Independent of the Central Model.
View range: The View Range dialog has been improved to provide visual descriptions of view range terminology, making it easier for you to set the view range. See Modify the View Range.
Underlay: The Underlay properties have been improved to more clearly define what they do. A new grouping in the Properties palette, Underlay, contains the properties used to set an underlay range. The Underlay parameter is renamed to Range: Base Level. A new parameter Range: Top Level displays the next level above the Range: Base Level. The options for Underlay Orientation are changed from Reflected Ceiling Plan to Look Up, and from Plan to Look Down. See View Properties and Create an Underlay.
Filters dialog: The Filters dialog has been improved to make it easier to find specific filters in the list. Filters are listed alphabetically and sorted in a tree structure with headings for rule-based and selection-based filters. See Create a Category-Based Filter.
Reference plane names: You can name reference planes directly in the drawing area. In the drawing area, click on the text label for a reference plane to define or change its name. See Name Reference Planes.
Architectural Enhancements
Perspective views: Additional modeling capabilities are now available in perspective views. See Work in a Perspective View.
Modify panel (Copy)
Clipboard panelPaste drop-down (Paste from Clipboard), and any available tool from the drop-down
Spot slope: You can now place a spot slope annotation in a linked model. See Add a Spot Slope Dimension.
Wall joins:
When placing walls, you can allow or disallow wall joins with the Join Status option. See Place a Wall.
You can select multiple wall joins and change the configuration of all selected joins to Butt, Miter, or Square Off. See Change the Configuration of a Wall Join.
Railings: When you edit the Type properties of a railing, you can now use the Preview pane of the dialog to view your changes. See Preview Family Types.
Autodesk Raytracer rendering: Define a custom render quality to specify light and material accuracy, and render duration options. See Define a Custom Render Quality (Raytracer).
Energy Analysis:
Advanced thermal zoning: Revit now offers automatic thermal zoning that uses advanced algorithms, resulting in more accurate energy simulations without additional modeling. See About Automatic Thermal Zoning.
On the ribbon, the Enable Energy Model tool has been renamed to Create Energy Model. Use this tool to create the energy analytical model and display it within the context of Revit. (When an energy model exists, the tool changes to Delete Energy Model .) See Create or Delete the Energy Model.
The accuracy and appearance of analytical surfaces has been improved. Edges are less pixilated, and surfaces are more accurate and less faceted. As a result, the energy analytical model is more accurate, looks better, and generates a smaller XML file. See About Viewing an Energy Model Based on Building Elements.
Mechanical, Electrical, and Plumbing Engineering Enhancements
Fabrication: The following changes help to improve workflow and productivity for fabrication detailing tasks.
Insert part: You can place a tee, valve, damper, or in-line equipment into a straight duct or pipe segment. See About Fabrication Part Placement Tools.
Connect as tap: You can connect a duct fabrication part fitting to a rectangular main using the same behavior as a tap. See About Fabrication Part Placement Tools.
Rotation tools: To improve ease of use, you can use ribbon commands and in-canvas controls to rotate fabrication parts. See About Fabrication Layout Editing Tools.
Show service: To make it easier to select a service in the MEP Fabrication Parts palette, Show Service sets the palette to the selected model element's service. See Show Service.
Electrical settings: You can specify a default rating to use for creating circuits in a model. See About General Electrical Settings.
Assigning a distribution system: If there is only one distribution system applicable to an equipment instance, the distribution system is now assigned automatically. See Select a Distribution System.

New in Autodesk Revit 2015 Build20140322_1515 (Apr 30, 2014)

Analysis:
Enhanced structural analytical model - The structural analytical model was improved in several different areas.
Collaboration:
IFC Linking - Now an IFC file can be linked into an existing Revit project.
Design:
Trim/Extend Multiple Elements - Trim / Extend has been updated to enable for box selection of multiple elements.
Family Parameter Order Adjustment - Easily adjust the Family Parameter order to company standards.
Reinforcement for parts - Add reinforcement to concrete parts.
Presentation for Rebar Sets - Document multiple rebar within a host, only showing a representative subset, allowing the creation of legible reinforcement documentation.
Structural Section Properties - Now Structural Framing elements can be identified by their section type, containing consistent and unambiguous definition of sectional properties.
Calculation methods for pressure drop - Calculate pressure drop for duct and pipe using either Haaland or Colebrook equations in Mechanical Settings.
Tooltips for Family Parameters - Improve learnability by customizing Revit MEP tooltips and communicating parameters and their use.
Accuracy of "as-built" Model Definition - New capabilities and features enable precise definition and placement of structural framing elements in space.
Assembly Code Settings - New Manage Assembly Code Setting dialog allows user to change UniformatClassifications.txt location.
Pinned elements enhancements - Pinned elements are prevented from being deleted unless you specify. Elements must be unpinned before they can be deleted.
Documentation:
Enhanced Hidden lines - Parameter to control the visibility of Hidden Lines in your views.
Revision improvements - You can now delete revisions and better sketch revision clouds shapes.
Tag improvements - When you move a tagged element, or drag the tag head, the tag leader and elbow adjustment behavior is now consistent with that of text leaders.
Enhanced Schedules/material takeoffs - Schedule Enhancements with Parameters, Filter & Grand Totals.
Images in Schedules - Include images in schedules to convey graphical information for elements.
Keynoting Settings - Keynoting revision dialog has a single path with absolute / relative / library locations.
View References - Improved functionalty when changing the referenced view after a view reference has been created.
Duplicate Views - When you duplicate a view "Copy 1" is now added to the name.
Reinforcement Numbering - Rebar and fabric reinforcement now have number sequencing that matches with existing reinforcement.
Enhanced Multi Rebar Annotation - Multi Rebar Annotation, when applied to more than one rebar set, now includes enhancements such as grouping and sorting tags or segments.
Tapped duct and pipe tags - Now tag a numerical value along a tapped duct or pipe that varies along its length.
Visualization:
Anti-aliasing improvements - Turn on Anti-aliasing per view to smooth out lines on the screen.
Sketchy Lines - Achieve a hand drawn, informal sketch look, by just pushing a button.
Ray Trace usability improvements - Render faster without white noise.

New in Autodesk Revit 2013 Build 20130221_2030 (Mar 23, 2013)

Project templates. The workflow around project templates has been improved. On the Options dialog, File Locations tab, you can list multiple templates and specify the file locations. The first 5 templates display on the Recent Files window for easy access when creating a project. Or click New to access the full list of templates, or None to start without a template.
Project Browser. You can now search for entries in the project browser using the Search in Project Browser dialog. Right-click in the Project Browser and select Search to open this dialog.
View types. You can create custom view types for plan views, 3D views, legends, and schedules, in addition to elevations, sections, and drafting views. For example, you can create a Furniture Floor Plan view type, to which a particular view template is always applied.
View templates. View templates have been improved to provide stronger control over views. You can now assign a view template to specific views. Future changes to the template will affect the views to which it is assigned. You can also apply a view template to a view without permanently assigning the template to the view. If a view property is defined by an assigned template, you cannot change that property in the view's Properties palette.
Filter list. On several dialogs, you can filter categories by discipline using the Filter list. This list replaces the Show categories from all disciplines check box.
Dimension enhancements:
You can now tab to an individual segment in a multi-segment dimension chain, and delete the segment. See Removing a Dimension Line Segment.
The new Diameter dimension tool allows you to dimension a diameter and also includes an option for a diameter symbol. See Diameter Dimensions.
Dimension instances in equality strings can display segment Values, Equality Text, or a new Equality Formula string. See Changing the Equality Display and Defining an Equality Formula.
Family editing. Double-click an instance of a family in a project to open the family for editing. See Modifying Families in a Project (or Nested Family).
View references. View references can now be placed in any standard project view except schedule and sheet views. During placement, options are available to choose the view type and target view.
Visualization Graphics:
Background now includes options for Sky or Image settings. Accessed from the Graphic Display Options dialog, this functionality is available in Elevation, Section, Isometric, and Perspective 3D views. Also the background options are available in Hidden Line, Shaded, Consistent Colors and Realistic visual styles.
Surface Transparency Sliders. The Ghost Surfaces and Transparent Override options were replaced with a Surface Transparency slider. Now you can set a Surface Transparency override between 0-100 by Element, Category, Filter and View. Access the Surface Transparency slider from the Graphic Display Options dialog, or select an element, right-click, and select Override Graphics in View By Element, By Category, or By Filter.
Hardware Acceleration Support for WARP. WARP software graphics solution replaces OpenGL on Windows 7. This benefits visual display features such as Ambient Occlusion and the Realistic visual style. See Hardware Acceleration.
Anti-Aliasing now provides smoother lines for geometry in all views.
Realistic Visual Style:
RPC Appearance allows you to preview your RPC in the Realistic Visual Style. Previously, you could only see the real picture of entourage in a rendered view. This feature is available in all view types where Realistic visual style is available.
Artificial Lights and Photographic Exposure settings on the Graphic Display Options dialog provide additional options for creating more realistic scenes.
Ray Trace Visual Style is a photorealistic rendering mode that allows you to interact with the camera in real time on 64-bit systems. (Ray Trace is not supported on 32-bit systems.)
Materials:
New data model incorporates an extended set of material assets, including appearance as well as structural and thermal performance properties. These properties can be applied to projects in logical combinations for a range of different purposes, such as appearance for rendering, and thermal properties for whole building energy analysis.
New user interface leverages the new data model and provides consistency across several Autodesk products, including Revit, AutoCAD, and Inventor.
Thermal properties data facilitates heating and cooling load calculations, energy analysis, and gbXML support.
Structural properties data facilitates structural analysis.
DGN export/import. Support has been added for V8 MicroStation file format, with a new user interface that provides mapping functionality for levels, lines, line weights, patterns, and text and fonts. DGN export setups can be saved to the project file and copied between projects using the Transfer Project Standards tool. Users can now specify whether slightly off-axis lines will be automatically corrected during import.
IFC export/import. IFC capabilities were enhanced to significantly reduce the number of surface models exported, resulting in better performance. More elements are supported, such as assemblies, parts, and curtain walls on massing elements. Other performance enhancements include reducing the IFC file size for many use cases.
Revit Server. A new architecture supports storage of central models on multiple host servers, to which users connect through locally-installed Accelerators (similar to the local servers used in previous releases), which provide optimal performance. Full functionality is retained even when the Accelerator is unavailable, and the connection is automatically restored when the Accelerator becomes available again. The Revit Server Administrator tool provides centralized management of model data, and administrators can now move models among host servers without users having to create new local copies. The impact of model level locks and orphaned model level locks has been reduced. Revit Server can now be installed side-by-side with previous versions and with Autodesk Vault.
Construction modeling:
Parts. New functionality for parts includes the ability to merge parts and to add or remove parts from the merged part. Parts can now be excluded from the project so that they are not visible and will not be included in schedules or material take-offs but can be restored when needed. You can also specify a divider offset for part divisions and apply customizable family profiles to a division. Parts can now be made from loaded families (such as Columns, Structural Columns, Structural Framing, and Generic Model) and from originals in a Revit link.
Assemblies. For assemblies, 6 new view options have been added for creating detail section views around the outside of the assembly instance. Assembly views can now be placed on project sheets, and project views placed on assembly sheets. Element creation tools are now available in edit assembly mode. Assemblies now have an origin, allowing the assembly type to be changed for an assembly instance. The origin also provides a local coordinate system used to determine how the assembly geometry is displayed in views on a sheet.
Conceptual Design Environment. You can apply divisions onto paths and form edges with nodes which can host components and component arrays. This facilitates placing many instances of the same element in a finite series.
Loop Arrow Style. You can specify a loop arrow style for annotations. See Specifying Arrowhead Styles.
Worksharing Enhancements. The editing request workflow has been improved through dynamic interactive notifications. You can now immediately grant or deny permissions and see highlights of the corresponding requested elements in the drawing area.
Zoom To Fit. You can double-click the mouse wheel to zoom all visible project contents to fit within the active view.

New in Autodesk Revit 2012 Build 20110309_2315 (Jun 2, 2011)

3D mouse:
Revit supports using a 3DConnexion 3D mouse to reorient and navigate a view.
Ghost surfaces:
Use this new option in the Graphics Display Options dialog to see elements that are obstructed by a wall or a pipe, for example. You can select Ghost Surfaces as a view override, a category override, or an element override.
Point Clouds:
Insert an Autodesk-indexed point cloud file (.pcg) or convert a non-indexed file automatically. See Using Point Cloud Files in a Revit Project.
Once linked, the cloud integrates seamlessly with Revit concepts like Section Box and Manage Links.
Revit can extract planar references from the cloud data, making it easy to place elements (such as walls) using the cloud as a reference.
Construction Modeling:
Parts:
Divide model elements into discreet parts that can be independently scheduled, tagged, filtered, and exported. Parts can be divided into smaller parts, and they are automatically updated to reflect any changes to the element from which they are derived. Modifying a part has no effect on the original element.
Assemblies:
Select any number of element instances or groups to create an assembly. Assemblies constitute a distinct category of Revit elements. They can be edited, tagged, scheduled, and filtered. After creating an assembly, you can select an instance and generate one or more types of detail views, having them automatically placed on a sheet if desired.
Citrix-Ready:
Autodesk Revit 2012 has been certified "Citrix-Ready." See Setting Up Citrix-Ready Autodesk Revit 2012.
User Interface Enhancements:
Rotate tool. To relocate the center of rotation, drag or click the Center of Rotation control, press the Spacebar, or click Center of Rotation: Place on the Options Bar. See Rotating Elements.
Type Selector. To maximize space in the Drawing Area, you can add the Type Selector to the Modify tab on the ribbon. See Properties Palette.
Keyboard shortcuts. Export all commands, even if they do not have shortcuts assigned, to a local xml file. You can edit the local xml file to assign shortcuts to commands, and then import them back into Revit. See Keyboard Shortcuts.
Graphics
Improved selection and pre-selection effects. By default, a selected element displays as a semi-transparent blue color. You can change these colors, and control the use of semi-transparent from the Options dialog. Also, as the cursor hovers over an element, before it is selected, the same semi-transparent blue color displays along with a halo effect around the edges. See Use and Manage Views.
Improved grips. Grips and controls now display with smooth edges, and are easier to see. Temporary dimensions now display in a blue color rather than black.
Improved tessellation of small objects. Small family components, such as screws and pipe fittings, as well as DWG imports, display with high clarity.
More flexible visual style combinations. You can now create visual styles such as Realistic with Edges, Consistent Colors with Shadows, Consistent Colors with Ambient Occlusion, and Hidden Line with Ambient Occlusion. The Ambient Occlusion effect now prints.
Graphic display options. An improved Graphics Display Options dialog now has 5 categories from which you can set visual display options: Model, Shadow, Lighting, Sun and Shadow Intensity, and Background. You can also save the settings as a view template.
Edges in visual styles. To turn edges on (default) and off for the Shaded and Realistic visual styles, use a checkbox in the Graphics Display Options dialog.
Ghost surfaces. Use this new option in the Graphics Display Options dialog to see elements that are obstructed by a wall or a pipe, for example. You can select Ghost Surfaces as a view override, a category override, or an element override.
Improved graphic card error messaging. If graphic card issues arise between your computer's video card and Revit, a message displays in the Graphics tab of the Options dialog, explaining what the issue is and how it can be resolved.
Display styles for analysis add-in applications. You can concurrently display multiple calculated results in 4 possible display styles: colored gradients, markers, diagrams, and vectors. These multiple analysis tools are also available to the Revit API. See Display Styles for Analysis Add-In Applications. The functionality of legends has been enhanced to improve documentation and meet the needs of all 4 display styles.
Materials:
Use the Paint and Remove Paint tools in 3D perspective views. You can select faces in 3D views to apply or remove paint.
The Paint tool opens the Materials browser for modeless selection. See Applying Materials to Elements.
Materials applied by the Paint tool to the faces of elements are distinguished from those applied as the property of an element. You can schedule materials applied as paint.
Share user property set libraries with Revit and other Autodesk applications.
Multiple materials can reference the same appearance or structural property sets.
Worksharing:
Worksharing display modes are temporary view modes that use color to visualize the status of workshared elements. You can customize these display modes to visually distinguish the following in a view: borrowed elements, current element owners, model updates, and element checkout status. See Worksharing Display Modes.
Disable worksharing to turn a workshared model into a non-workshared model. See Disabling Worksharing.
Control the frequency of worksharing model updates. See Controlling Worksharing Display Updates.
Receive editing request notifications when a team member requests a workshared element that you currently own.
Specify the default view that Revit displays when a model is opened. See Specifying the Model Starting View.
Additional access to the Manage Worksets command is provided by right-clicking a linked model listed under Revit Links in the Project Browser. See Opening Linked Worksets in the Host Model.
Revit Server:
Use editing requests with Revit Server.
Use the Revit Server command-line tool to automate the creation of local models to facilitate worksharing.
Use the Revit Server command-line tool to save a copy of the specified model as an RVT file. See Revit Server Lock and Save Command-Line Utility.
Revit Server Administrator displays more detailed model submission information and provides the ability to add comments when checking in files.
Linked Models:
You can tag rooms, spaces, areas, and HVAC zones in linked models. See Overview of Tagging Elements in Linked Models.
Use the Tag All Not Tagged tool to place room, space, and area tags on elements in linked models. See Tag All Not Tagged.
You can place keynote tags on elements in linked models. See Placing Keynotes in Linked Models.
You can place tags for beam systems, floor/footing span symbols, and area/path span symbols on elements in linked models. See Overview of Tagging Elements in Linked Models.
Use the Beam Annotations tool to place tags and spot elevations on beams in linked models. See Tagging Beams in Linked Models.
To sort rows in the Manage Links dialog by any column, click the column header. See Manage Links Dialog.
Copy/Monitor:
More MEP categories. The Copy/Monitor tool supports additional MEP fixture categories, including: Communication Devices, Data Devices, Electrical Equipment, Electrical Fixtures, Fire Alarm Devices, Lighting Devices, Nurse Call Devices, Security Devices, Sprinklers, and Telephone Devices. See What Types of Fixtures Can I Copy?
More actions. Additional actions are supported for MEP Fixture Copy/Monitor rules (Accept Difference, Move Fixture in Host to Position of Fixture in Link). See Actions for Coordination Review.
Modeling Enhancements:
Cutting geometry with solids. You can use solid forms to cut other solids as with voids. When you use a solid, you remove the overlapping area, and the abutting solids remain. This capability is available in conceptual massing and for family instances of all categories in the project modeling environment. See Cutting Geometry with Solids.
Surface Subregions. A surface can host subregions that have their own properties. You can assign a material to a subregion or extrude its profile into a solid or void form to change the topography of the surface. This capability is available in both conceptual massing and in-place families in the project modeling environments. See Splitting Faces.
Workplane Viewer. Use the Workplane Viewer to modify work plane dependent elements of a conceptual model. This tool is useful for editing profiles in forms, sweeps, and swept blends. This is available in both the conceptual massing environment, all families, and project modeling environment. See Editing with the Workplane Viewer.
Formula-driven component types. Parameters created to drive component types in families can be generated by conditional formulas. These parameters may also be applied for panelization of divided surfaces. Formula-driven component types can be used in pattern families, adaptive component templates, conceptual massing environment, and all other Revit families.
Rounding function in formulas. You can round integers in a formula to a whole number. New functions include round, roundup, and rounddown.
Hosted point parameter. The Hosted Point parameter can be assigned a measurement type to segment length, normalized segment length, chord length and angle for circle, in addition to normalized or non-normalized curve parameter for points hosted on curves and edges. Once the measurement type is determined, you can specify the beginning or end of the line from which the selected hosted point location is measured. This is available in both the conceptual massing environment and in-place families in the project modeling environment. It is also available in the generic model adaptive and curtain panel by pattern component templates.
Placement of adaptive components in a project. Adaptive components can be placed in the project environment, no longer requiring to be contained in a massing family. Adaptive points and shape handles are also available in the project environment and maintain the same behaviors when placed in the conceptual massing environment.
DWG/DXF Export:
Use a new, resizable, tabbed dialog to manage setups for improved fidelity when exporting Revit projects to DWG and DXF formats for use in CAD applications, or publishing the exported files to Buzzsaw.
Improved layer mapping lets you easily add prefixes and suffixes to layer names to build the layer structure you need.
Use new mapping functionality for lines, patterns, and fonts.
Export setups preserve settings for future use.
Revit Families:
Save all loaded families to a folder. See Saving Loaded Families.
Export family types from the current family to a text file. See Exporting Family Types.
Import family types from a text file into the current family. See Importing Family Types.
Dimensions:
Dimensions can have 2 types of leaders: Arc and Line. See Permanent Dimension Type Properties.
For arc leaders, there are 2 options for the Show Leader When Text Moves parameter: show the leader when text moves beyond the witness line, and show the leader when text moves away from its origin. See Moving Dimension Line Text.
Line leaders can be placed inline or above the text by using the Text Location parameter. See Permanent Dimension Type Properties.
Line leaders can display with a shoulder by specifying a shoulder length parameter. See Permanent Dimension Type Properties.
A new Leader Tick Mark parameter allows arc and line leaders to display an arrow on the dimension side. See Permanent Dimension Type Properties.
You can control the visibility of a dimension leader at the segment level: select By Element, Always On, or Always Off. See Controlling the Visibility of a Dimension Segment Leader.
You can specify a global alternative to the EQ label for equal dimension segments. See Changing the Default Equality Text Label.
You can override the individual dimension segment value or equality label with custom text. See Overriding a Permanent Dimension Value or Equality Text Label.
Tagging:
You can lock a 3D view and tag elements in the view. See Tagging in 3D Views.
See also information about tagging in linked models (above).
Journal Files:
Journal files reside in the following location:
Windows XP: %USERPROFILE%\Local Settings\Application Data\Autodesk\Revit\\Journals
Windows Vista or Windows 7: %LOCALAPPDATA%\Autodesk\Revit\\Journals
Conceptual Energy Analysis Updates:
For subscription customers who use the Conceptual Energy Analysis feature, the latest updates for Energy Analysis reports and features are automatically installed while Revit is running. Updates for Conceptual Energy Analysis are checked when a user selects Analyze Mass Model or Results & Compare on the Analyze tab of the ribbon.
User Assistance (Documentation):
For online users, WikiHelp provides access to the full Autodesk-provided Help content, and lets you rate, comment on, and contribute content (articles, images, videos) to share with your peers.
For offline users, a locally stored copy of the Help content is provided in a browser window, providing seamless access to user assistance.
You can change settings to specify whether you want to use WikiHelp or the locally stored Help, and your preferred web browser for viewing the Help. See Online Help.
Performance Improvements:
Purge Unused improvements. The Purge Unused tool now includes unused import categories and object styles.
Multi-threaded element loading. Loading elements into memory is now multi-threaded, thereby reducing view open times when elements are displayed for the first time in the session.
Parallel silhouette computation. Multi-threading is enabled for the following:
Computation of silhouette edge graphics, which is the outline of a curved surface, in perspective 3D views. This improvement is engaged when opening views, changing view properties, and navigating the view. Its effects are more noticeable as the number and complexity of curved surfaces increases.
Computing the graphical representation of model elements. This improvement is engaged when opening views and changing view properties. Its effects are more noticeable as the number and complexity of model elements increases.