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This adds empty pages at the positions you choose. New pages match the size of their neighbour by default, so they print on the same paper as the rest of the document without anyone having to think about it.

Two situations account for almost all use. The first is double-sided printing, where a section that ends on an odd page pushes the next section onto the back of a sheet - a blank page fixes the parity. The second is leaving room: space for handwritten notes, for a signature, or for a page that will be scanned in later.

작동 방식

1. Drop the PDF onto this page.
2. Choose where the blanks go: at specific positions, after every page, or at the very end.
3. For specific positions, list them and say whether the blank goes before or after each one.
4. Set how many blanks to add at each position, and optionally force a paper size instead of matching.
5. Press Insert pages and the download starts.

Matching the neighbouring page size is the default because a mismatched blank is worse than no blank at all: it makes a printer switch trays mid-job, or scale every other page to fit. Forcing a standard size is available under advanced options for the cases where you genuinely want it, such as adding an A4 notes page to a document of mixed sizes.

After every page is the option to reach for when preparing a single-sided document to be printed double-sided with the backs left empty - each original page ends up on the front of its own sheet.

Positions are interpreted against the original document, not against the growing one. Asking for blanks after pages 3 and 7 gives you blanks after the original pages 3 and 7, rather than after page 3 and then after whatever has been pushed into position 7 by the first insertion.

Bookmarks are shifted to follow their pages, so a table of contents still points at the right chapter after pages have been inserted ahead of it.