Following this answer to my SuperUser post, I use Sejda to maximize the crop box without cutting any page content. But into which box ought I enter the margins? As I questioned in that post:

I must print PDFs over 500 pages and with footnotes. All pages are bordered by white blank space, but the white blank space start at different lengths from the border. To wit, the cutoff and dimensions of the text and images differ for each page.

It's too inefficient to measure the cutoff of white blank space on each page. How can I deduce the maximum crop size that'd eliminate the most white space, without cropping the text?

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Here's the source for the picture below.

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  • Is your posted image explaining the boxes not clear enough? And Margins for what??? – Scott Aug 17 '19 at 0:41
  • Sorry. I can't distinguish these 4 terms still. I meant the new margins, lower inches, that I fancy for the PDF. – Greek - Area 51 Proposal Aug 17 '19 at 7:18
  • What are you trying to achieve? Are you making a pdf to be viewed on screen or a pdf for print? (If you have access to a layout program like InDesign or Illustrator it would probably be easier to just place the pdf in a document with the desired dimensions and export a new pdf.) – Wolff Aug 18 '19 at 21:33
  • @Wolff Does my edit clarify? – Greek - Area 51 Proposal Aug 20 '19 at 0:05
  • Yes and no. It's hard to tell without seeing the material you have to work with. It's commonly the trim box which tells the printer which final size the document has (as explained on the page you link to). But I don't understand why you focus on the different white margins. The most important thing is to make all the 500 pages the same size as the paper you wants to print on. If they are all different sizes it's not so easy. If they are all the same size, but with different margins it won't help to crop the pages, they'll need to be scaled as well, but then the font sizes will differ... – Wolff Aug 20 '19 at 5:46

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