如何在 Acrobat 中永久裁剪

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原英文标题：How to crop permanently in Acrobat

You can use PdfCpu:

pdfcpu crop '0 0 .5 0' in.pdf out.pdf

https://pdfcpu.io/core/crop.html

Or if you must use Acrobat:

You can do this with a Preflight fixup. It is annoying to set up, but pretty easy to use after that.

1. Tools Print Production Preflight Select single fixups Options Create New Preflight Fixup
2. Name Permanent crop
3. Fixup category Pages
4. Type of fixup Set page geometry boxes
5. Source MediaBox
6. Destination Relative to TrimBox (meaning "use the dimensions of the TrimBox").
7. OK
8. Fix