Flag changed purchases, compare promotion pay. Every one is ready to run, and you can adjust it in plain language.
Warn reviewers when a print proof changes after approval arrives.
Keep reviewers aware of changes to a proof before they act on a decision. Your task shows the mismatch and asks for confirmation.
Put revised print proofs and outstanding corrections on one task.
Your reviewer can find the new proof beside the earlier version and the fixes still open, right on the task.