I could definitely see a use for copying proofs with the markups when there are versions to create. It would be a real timesaver to simply copy the proof (with any comments), and markup what the differences would be for the other versions – for example we do consumer and trade versions for each brochure. The differences are slight, but we always wait until we have the final, clean, no more comments proof before marking it up to create the trade version. When something is running late, being able to copy the proof and get ahead of this (without losing any of the final edits) would be a real timesaver.