Feature Creation Check Boxes. Both the calculated points and geometry used for the evaluation can be obtained for some feature checks by turning on these check boxes in the Users Options. This can be a very helpful diagnostic tool, however, it creates a lot of new points and geometry. The image below shows the resulting geometry created by enabling the Feature Creation check boxes on a Composite True Position check.
Cross-Section Criteria. In order for a group of measurements to be considered a cross section, they must be within the default 1mm of each other in the cross section direction. In other words if you fit a plane to the data none of the points would be greater than .5mm from the plane. In order to take measurements in this format a geometry trigger measurement mode would be easiest. This cross section criteria can be adjusted by selecting GD&T Options under the Analysis tab in the User Options dialog. The number of cross sections used in the analysis is re- ported in the summary table of the check.
Datum Combination Tolerances. These tolerances are used to determine how nominal features are to be handled. It accounts for slight variations in a nominal model and allows for grouping of nearly perfect objects as needed within these categories.
Enable Automatic Feature Detection. This option can be used to enable or disable automatic face detection. When enabled, SA will search adjacent faces on the CAD model and include them in the selection. This allows all 4 faces defining the walls of a hole to be selected with a single click, as an example.