To create a vision Square Slot, follow these steps:
For machines supporting DCC
motion, select DCC Mode 
if you want to create and measure square slots in DCC mode.
Select Auto
Square Slot 
from the Auto Feature toolbar. You can also
select the Insert | Feature | Auto | Square Slot
menu option. This opens the Auto Feature
(square slot) dialog box.
Vision Square Slot Auto Feature dialog box
With the Auto Feature dialog box open, select a square slot in one of two ways:
CAD Selection Method - From the CAD tab, click once near the edge of the square slot on the CAD surface to establish the square slot's location.
Target Selection Method - From the Vision tab, click two points on one of the two longer side edges, then click one point on one of the two end edges, then once on the other longer side edge, then finally once on the other end edge. This establishes the square slot's location. Adjust the lighting and magnification as needed.
Click as close as possible to the CAD element to ensure PC-DMIS does not choose an incorrect element.
PC-DMIS Vision automatically places the nominal data for the square slot into the Auto Feature dialog box. The hit targets are automatically displayed for the square slot.
Adjust the nominal information in the Auto Feature dialog box to match the theoretical values of the square slot. Also, adjust the values of the Probe Toolbox as needed.
Click Test to test square slot measurement.
Click Create on the Auto Feature dialog box to add the square slot to the measurement routine.
Save the measurement routine for future execution. See "A Note on Executing a Vision Measurement Routine".