Execute the measurement routine up to this point to measure the eight surface points. To do this:
From the Edit Window toolbar (View | Toolbars | Edit Window), select Clear Marked
.
This ensures that the manual alignment point (PNT1) is not included
when you select Mark All.Select Mark All
.When the "Ok to mark manual alignment features?" message appears, click NO.
Select Execute
. PC-DMIS measures
the eight surface points.
From within the Edit Window, ensure that the LAST line in the measurement routine is highlighted.
Select the Insert | Feature
|Constructed | Plane menu item or the Constructed
Plane button 
from the Constructed Features toolbar (View | Toolbars | Constructed Features). The Construct Plane dialog box appears.
Select the 
Best Fit option.
From the feature list, highlight the eight surface points measured in "Step 3: Measure Features for Datum A". In this example, the points are PNT2 through PNT9.
Type DATUM A in the ID box.
Click Create, and then click Close to add the plane feature to the measurement routine.