[Brian]

Sean, we're happy to help, but if you have 20 separate pages, wouldn't 20 canvases with one layer work better than 1 canvas with 20 layers?

Set up that way, OmniGraffle will print all the pages as part of one PDF document; there's no need to print them separately and stitch them back together in Acrobat.

I'm not one of our resident OmniGraffle experts - if you email the support ninjas, you'll reach them. Just trying to understand your workflow.