PDF Editing Issues

How to Fix Signatures and Comments Missing in a Saved PDF

Phi Hung Vo Oct 22, 2026 868 views

Question details

Signatures and edited text are visible while editing a PDF in Acrobat, but they do not appear in the saved file or when the document is sent as an email attachment.

How to Fix Signatures and Comments Missing in a Saved PDF

Product: Adobe Acrobat
Device & OS: not provided
Scenario: Saving a recently edited PDF document and attaching it to an email in Gmail.
Observed behavior: The annotations, comments, and signatures are missing from the saved PDF file and the recipient's copy, even though they were visible on screen before closing.

Before you start

Verify that you are checking the exact file location where the PDF was saved to ensure you aren't accidentally opening an older, unedited version of the document.

Solution 1Recommended

Save as a New Copy to Ensure Changes are Applied

Saving the edited document with a completely new file name prevents the common mistake of accidentally attaching the original unedited file.

Often, email attachments lack signatures simply because the sender accidentally attached the original version of the document instead of the edited version. Forcing a 'Save As' action guarantees a distinct file is created.

Save as a new file

In Adobe Acrobat, click on 'File' in the top menu and select 'Save As'. Enter a slightly different file name (e.g., append '_signed' to the end).

Verify the saved file

Close Acrobat, then navigate to your folder and open the newly named PDF to confirm the signature and comments are visibly present.

Attach the correct file

Open Gmail, click 'Attach files', and specifically select the newly named file containing your signature.

Save as a New Copy to Ensure Changes are Applied

Verification Tip: Always open the attachment directly from your email client's draft window before hitting send to double-check that the annotations are intact.

Solution 2

Flatten the PDF using Print to PDF

If signatures were added as comments or annotations, they may not display correctly in other viewers. Flattening the file embeds them permanently into the document.

Sign and Flatten PDFs easily

Add and Save Permanent Signatures with WPS PDF

WPS Office includes a robust PDF editor that allows you to seamlessly insert signatures, add comments, and save them permanently without the risk of losing your annotations when sharing via email.

1. Open PDF in WPS Office: Launch WPS Office and open your PDF document using the built-in PDF viewer and editor.
2. Insert your signature: Navigate to the 'Insert' tab and click on the 'Sign' button. Create or select your signature and place it anywhere on the page.
3. Flatten and export: To ensure the signature is uneditable and permanently visible for email sharing, use the Print function and select the 'WPS PDF' virtual printer to output a flattened copy.

Easily insert and manage digital or handwritten signaturesFlatten PDFs effortlessly to secure comments and annotationsFully compatible with standard Adobe PDF document formatsLightweight and free to use for daily PDF editing tasks

microsoft office alternative - wps office

Frequently Asked Questions

Why do my PDF signatures show as blank boxes when I send them?

This usually happens when the recipient opens the PDF in a web browser or a basic viewer that does not support active annotation layers. Flattening the PDF before sending forces the signature into the main image of the document.

How do I flatten a PDF without Adobe Acrobat?

You can flatten a PDF using the built-in 'Print to PDF' function on Windows or Mac. Alternatively, free software like WPS Office allows you to export or print the document as a flat PDF file easily.

Will flattening a PDF prevent others from removing my signature?

Yes. Flattening merges all text, comments, and form fields into a single background layer, making the signature a permanent, non-editable part of the document.

PDF Troubleshooting