Working in InDesign CC 2015 and I wonder if there is a way to enlarge the slug area beyond the default 6". In this case, I'm using the page size to create iPhone screen layouts, the bleed to feature a mockup of the iPhone itself, and ideally the slug to feature callouts, and other directions. Unfortunately, InDesign wants me to keep those slugs on the small size, relatively speaking.
Funny thing is that I'm using 3x retina sizes so 6" would be plenty if I was working at scale.
My imagined workaround is to place the pages of this InDesign file into another, which can serve more as the "presentation", with a header, page numbers, etc. It's an extra step, but seems to be an immediate solution.
Any help is appreciated.