Q: I am applying a tolerance to a feature that requires a reference feature specification. How do I specify the reference feature to be used for my tolerance?
A: Reference features can be specified for Parallelism, Perpendicularity, Angularity, Concentricity, and Runtout tolerance types.
When one of the tolerance types above is applied to a given feature, the reference feature dropdown list will be displayed in the Tolerance feature detail screen, directly to the right of the tolerance value field, as seen below:
IMPORTANT: Only features measured previous to the feature being tolerance can be specified as a reference feature.