(This item pertains to the check boxes on the General tab of the Setup Options dialog box. You can open it through the F5 key or through the Edit | Preferences | Setup menu option.)
The Use CAD Provided IDs for Features check box allows you to import feature IDs from a CAD file. When you select this check box, PC-DMIS automatically inputs the given CAD ID into the Auto Feature dialog box when the CAD feature is selected with a left mouse click. If you decide to keep this value, then the feature created will have the given ID.