Driving Dimensions and Named Selections
When you select an object with a dimension property, you have the option of creating a Driving Dimension group. These groups are added to the Driving Dimensions folder. Driving dimensions include offset distance (faces with an offset relationship), round radius, and ruler dimensions. You can change the dimension in the groups panel, and the geometry will change. These saved groups can be used for API-driven modification and can be sent to Ansys.
Creating a driving dimension with Move (translation or rotation)
Creating a driving dimension with the Select tool (round radius and distance between offset faces)
You may choose to create a Named Selection group whether or not a dimension property exists. If a dimension property is not available, you may create only a Named Selection group. These groups allow you to save selection sets to easily recall them.