Who is a reviewer? Someone who has been asked to evaluate a proof as part of a structured Approval Manager workflow. Reviewers may be designers, managers, customers, or any other stakeholder in any type of project that produces something that needs to be reviewed by others (Remember, Approval Manager can be used to review physical proofs as well as digital proofs). So, in the broadest sense, a reviewer is anyone who is asked to participate in an Approval Manager review.
Approval Manager has built in support for several different proofing technologies. Please refer to the appropriate handbook for the proofing technology used by your organization: