This is the main window of VistaMetrix that allows you to access the Action menu where you may set the Appearance, the Refresh time, the Graph, Measure, Pick Color and Text Annotation functions 

In the Appearance window you can set the Curves and Points, the Distance Scale and Markers, the Graph Axes and also the Label Colors 

The Continuous Plot Graph window allows you to enter the start and end axis values as well as the Axis scaling, shift and rotation 

Here you can see the Distance Measurement and the Scale windows that allow you to adjust or move the scale, enter scale length or select units