How to add a header or footer to a PDF on a Mac
By Himanshu Ranjan · Updated 8 November 2026
To add a header or footer to a PDF on a Mac, select it and run Pages › Add header/footer text… in FileDial, enter the text, and it writes a new copy beside the original. Links and form fields are flattened. It runs locally, so the document is never uploaded.
What a header or footer is for
A header sits at the top of every page and a footer at the bottom. In PDFs they are used for things that must be visible on every page: a document title, a version or draft label, a date, a confidentiality notice, a case number or a company name. A reader who lands on page 14 from a search result still sees where the page belongs.
Adding them to an existing PDF is different from setting them in a word processor. The PDF is already laid out, so the text is stamped over each page rather than flowing with the content. That works as long as the margins are clear, which you should check.
Add header or footer text with FileDial
The tool is Pages › Add header/footer text…, and it prompts for the text.
- Select the PDF in Finder.
- Hold the right Option key to open the dial and choose the Pages category.
- Release on Pages › Add header/footer text…
- Type the text you want and confirm.
- Open the new copy and check the top and bottom of the first, middle and last pages for overlap.
Header text, page numbers or a watermark
Several tools stamp pages, and they solve different problems. For page numbers use Pages › Add page numbers, Add page numbers (right), or Pages › Page numbers with format… for a pattern of your own. For a diagonal label across the page use Pages › Add watermark text… or Pages › Add image watermark… For a legal sequence use Pages › Bates numbering… For a label on page 1 only, there are stamps such as Confidential or Received.
Header and footer text is the quiet option: small and fixed, it does not cover content. If you want to combine page numbers and a title, run the header tool first, then the page-number tool, and check the result.
- Title or draft label on every page: header/footer text.
- Page x of y: page numbers with format.
- Across the page: watermark.
- Page 1 only: stamps.
Check the margins first
A scan with text running close to the edge will collide with a footer. Open the PDF and look at the top and bottom margins of several pages. If they are tight, crop or resize first: Pages › Resize to A4 or Resize to Letter changes the page size, and Pages › Crop margins by size… changes what is visible. A footer on top of body text is hard to undo, so test on a copy.
Color and size are what the tool offers; we cannot promise font choices beyond what the prompt shows.
Do it before signing, not after
Any change made to a digitally signed PDF will show the signature as broken. Add headers and footers first, finalize the pages, and then sign: Sign & Lock › Place signature… for an image signature, or Sign & Lock › Sign with certificate… for a certificate signature from your Keychain. Check signatures later with Sign & Lock › Verify signatures, which writes a .txt report.
Also remember the tool's note: links and form fields are flattened. If the PDF is a fillable form, add the header to a separate copy, or fill the form first.
A worked example: draft labels for a review round
A 30-page policy goes to three reviewers. Add the footer Draft v3, for review only, then run Pages › Add page numbers so everyone can cite page numbers in comments. Save both steps on a copy, and send that copy. When comments come back, edit the source, increment the label to v4, and repeat; because each tool writes a new copy, your earlier rounds stay intact in the folder.
Resist the temptation to put reviewer names in the footer unless the document is only for that person. For a name per reader, Pages › Per-recipient copies… makes a copy per name with a diagonal confidential watermark, and Combine › Per-recipient copies from list takes a PDF and a list and makes a watermarked copy per name, which is the right tool when each person needs their own marked copy.
The most common mistake is stamping the only copy. The second is putting too much text in the footer, so it wraps or runs off the page; keep it to one short line. The third is forgetting scanned pages, where margins are uneven: look at every page, not just the first. The fourth is leaving a Draft label on a file that has since become final. Keep a naming habit that makes the label visible in the file name too, so the wrong version is easy to spot.
Honest alternatives on a Mac
Preview can annotate a PDF with text boxes, as Apple's guide describes, but a text box lives on one page, so repeating it on every page is manual. For a few pages that is fine; for a hundred pages a header tool is the sensible route. If you control the source document, set the header in the original app and export again; that is the cleanest result.
Headers such as Confidential or a case number go on sensitive files. FileDial adds them on your Mac and keeps the original unchanged, with Undo on the result.
Questions
Can I add a footer to every page of an existing PDF?
Yes. Select the PDF and run Pages › Add header/footer text… in FileDial, enter your text, and a new copy is written with it on the pages. Check that the footer does not overlap content on pages with tight margins. Check the result before relying on it.
Will adding a header break the form fields?
FileDial's note says links and form fields are flattened by this tool. If you need a fillable form, keep the original and add the header to a separate copy, or fill in the form first and flatten it deliberately. Check the result before relying on it.
What is the difference between a footer and a watermark?
A footer is small text in the bottom margin, designed not to cover content. A watermark is text or an image placed across the page, often diagonal and faint. Use Pages › Add watermark text… for the latter, and the header and footer tool for the former.