Here are some key features of "RP Viewer":

· Model property calculations such as surface area, volume, number of vertices, edges, faces and shells, etc.
· Superior 3D trackball style viewing with dynamic zoom and pan
· Print and print preview
· Directly send model by email
· Pre-configured axis and isometric views
· Display model as solid, wireframe and points
· Orthographic and perspective projection
· Model transparency (vital in visualizing hollowed models)
· Different colors for front face, back face and background (helps in detecting errors in models)
· One-click copy to clipboard
· Customizable viewing options
· Capable of viewing multiple documents at the same time
· Comprehensive help system