Pages and files

How to Merge a poster PDF

Updated 2026-09-17 · 2 min read

The usual reason to merge a poster PDF is a time or location correction on a design you no longer have the source file for.

Merging keeps fonts, links and form fields intact instead of flattening everything into images, provided the tool combines rather than re-renders.

PDFfont edits PDF text in the document's own embedded font — no white cover boxes.

Steps to merge a poster PDF

Open the first document, then insert the others in the order you want them.

Drag pages in the page view to fine-tune the order and rotate anything scanned sideways.

Delete blank pages the scanner added and duplicate any page you need twice.

Export the combined file, compressing images if the result is large.

With this kind of document, very large type exaggerates every spacing difference, so the embedded font is essential.

One caution worth stating plainly: check it still reads clearly from a distance.

Doing the tidying before export means writing the file once rather than three times.

As many as your device's memory allows; dozens of ordinary documents are fine.

Yes, though duplicate field names across files may need renaming.

Yes. The editor runs in mobile Safari and Chrome, with touch-sized controls and a share sheet for saving the finished file.

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