Some ribbon tabs are associated with license features. Depending upon the tab you have invoked, additional units may
be drawn. These features will be checked out for the duration of the session.
You can change the unit system using the Unit System Selector or the Preferences. When importing "discrete mesh" files (.stl, .nas, .fem) with unspecified units, select the model unit in the Import
Options dialog.
Change the default unit system, create custom units, and measure geometry
features.
Define the Unit System
You can change the unit system using the Unit System Selector or the Preferences. When importing "discrete mesh" files (.stl, .nas, .fem) with unspecified units, select the model unit in the Import Options dialog.
Measure Features
Use the Measure tool to measure geometry features including a length, an angle, and the dimensions of a bounding box.