In this Question Line video, Jason answers a question about reverse inspection of orientation and walks through an example to explain why you should not deviate from the inspection criteria given in the feature control frame.
Parallelism is a fairly common symbol that describes a parallel orientation of one referenced feature to a datum surface or line...
The Cylindricity symbol is used to describe how close an object conforms to a true cylinder...
Perpendicularity is a fairly common symbol that requires the referenced surface or line to be perpendicular or 90° from a datum surface or line...
Angularity is the symbol that describes the specific orientation of one feature to another at a referenced angle...