I'm working on a CD foldup for a friend and it's a tri-folded 12cm by 36cm sheet printed on both sides. It creates six 12cm by 12cm pages, but I'm not sure how to work on it in photoshop. Should I create two different documents, both 12cm by 36cm, one for each side, or a single 24cm by 36cm to have every page on it?
I currently have the first page as a single 12cm by 12cm document because I didn't want to run into the other page at all.
Is there any way I can have a large canvas but confine myself to part of it? Something more reliable than just a selection please.