Fix Adobe Acrobat 9 Cannot Save PDF Comments in the Same File
Question details
The user is unable to save comments directly into the original PDF file using Adobe Acrobat 9 Pro and is forced to save a new copy instead.

- Product
- Adobe Acrobat 9 Pro
- Device & OS
- not provided
- Scenario
- Adding comments or annotations to a PDF document and attempting to save the changes.
- Observed behavior
- Acrobat prevents saving changes to the original file and prompts the user to save a new copy, likely due to document permissions or certification restrictions.
Check if this issue occurs with one specific PDF or every document you open, as this helps determine if it's a file-specific security restriction or a general software glitch.
Check Document Security and Permissions
Verify if the original document author has restricted commenting or editing privileges.
Often, a PDF is protected by the creator to prevent unauthorized changes. When a file has editing or commenting restricted, Adobe Acrobat will not let you overwrite the original file and will force you to save a modified copy if commenting is partially allowed.
Open the problematic PDF in Adobe Acrobat 9 Pro and click on 'File' in the top menu, then select 'Properties'.
Navigate to the 'Security' tab in the Document Properties window.
Look at the 'Document Restrictions Summary' box. Check the status next to 'Commenting' and 'Changing the Document'. If they say 'Not Allowed', you do not have permission to modify the original file.
If restrictions are in place, you will need to contact the document creator to obtain an unlocked copy, or ask for the permissions password to remove the security settings.

Save as a New Copy (Workaround)
Use the forced 'Save As' prompt to create an editable version if the original file is signed or uses Reader Extended rights.
Easily Add and Save PDF Comments with WPS Office
If older software like Adobe Acrobat 9 is causing compatibility or saving issues, try WPS Office. Its modern, built-in PDF editor lets you add annotations, highlights, and comments effortlessly, saving everything directly to your file without unexpected errors.
- 1. Open your PDF: Launch WPS Office and open your PDF document directly within the application.
- 2. Access Comment Tools: Navigate to the 'Comment' tab located on the top ribbon.
- 3. Add Annotations: Use the available tools such as Highlight, Text Comment, or Note to mark up your document.
- 4. Save Changes: Click the Save icon in the top left corner (or press Ctrl+S) to apply your comments directly to the original PDF file.

Frequently Asked Questions
Why does my PDF say 'Secured' at the top of the window?
The 'Secured' label indicates that the PDF creator has applied password security to restrict specific actions like editing, commenting, or printing. You cannot save comments to the original file unless you have the permissions password.
Does a digital signature prevent me from saving PDF comments?
Yes. When a PDF is certified with a digital signature, the document is locked to prevent tampering. Any changes, including adding comments, will invalidate the signature or require you to save a separate, uncertified copy.
Can I remove restrictions from a PDF to save comments normally?
If you know the permissions password, you can go to File > Properties > Security, and change the Security Method to 'No Security'. If you do not have the password, you must request an unprotected copy from the author.
Is Adobe Acrobat 9 still supported?
Adobe Acrobat 9 is a legacy product and is no longer officially supported by Adobe. Upgrading to a modern PDF editor or a comprehensive alternative like WPS Office is highly recommended to resolve compatibility and saving issues.




