I could be wrong but I think the "big 1s and 2s" signify how many crop boxes you have specified for that set of pages. So a simple whitespace crop will display 1 for the odds pages and 1 for the evens pages.
If you wanted to split each odd page into a top-half and a bottom-half then you would see a box 1 and a box 2 on the odds pages. It would be similar if you had a two-column PDF. You would draw two boxes for each page and they would be labelled 1 and 2. And a 3-column PDF you would draw 3 boxes and they would be labbeled 1, 2 and 3.
Last edited by jackie_w; 02-19-2011 at 12:39 PM.
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