(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 Find Nominals check box controls how PC-DMIS treats hits. When selected, PC-DMIS will then automatically consider each probe touch, finding the closest CAD nominal for that touch. It continues to accumulate hits until you press the End key. PC-DMIS then calculates the feature type and applies the CAD nominals.
Once selected, the Find Nominals Tolerance box becomes available. See "Find Nominals Tolerance".