To Specify Units in Relations
You can specify units for numeric constants directly in the Relations editor of the Relations dialog box by enclosing the units within brackets. For example, A=5[mm].
You can also use the Specify Units command to do the following tasks:
Specify units for a new parameter by adding units directly in the Relations editor.
Define units for a numeric constant or unitless parameter.
1. In the Relations dialog box, type an equation in the editor. For example, A=5.
2. Right-click and click Specify Units from the shortcut menu.
3. Select the units from the Select Units dialog box. The units are added to the equation.