Hello all. I've probably done something phenomenally stupid via fat fingers, but this is driving me mad...
I was working on an A4 sized document and then, for proofing and review purposes, scaled it down to A5 to export (Document Setup > Page Preset, Objects will: Rescale). A, what I assume is, an A5 sized blue box is now overlaid on my page (see attached).
Apologies if I'm being thick, but I assumed that the page itself auto-scales down and I don't need to manually resize everything to fit inside the new A5 box? More irritatingly, items on the page now snap to my new A5 friend.
If it's any help / hindrance, I'm using the Mac version. Thanks all!