I am creating my first multi-page catalog and have a few questions I would appreciate your help with.
This is a 20 page saddle stitch catalog with photos and a header that will cross over both pages of a spread.
Do I need to lay this out in reading sequence or in printing sequence?
My bigger question is how do I set up the document so that the photos and headers line up across the gutter?
Set up in readers spreads as a facing pages file. Place content as you want it to appear on the spread, crossing the spine if necessary so there's no special treatment required. For a stiched booklet you generally don't add bleed at the spine, so you don't need to do anything special for content that dies at the spine, but does not cross over, either. Export PDF as single pages.
Thank you Peter!