How to Recover Unsaved Comments and Notes in a PDF
Question details
The user needs to recover comments and notes that were added to a PDF but lost because the file was closed without saving.

- Product
- PDF Editor
- Device & OS
- not provided
- Scenario
- The user spent time adding annotations to a PDF document but either closed it without saving, or the application closed unexpectedly.
- Observed behavior
- The added comments and notes are completely missing from the PDF file upon reopening.
Determine whether your PDF application crashed or if you closed it normally. Auto-recovery methods usually only apply if the application closed unexpectedly.
Check Auto-Recovery Files After a Crash
If your PDF reader closed unexpectedly due to a system crash or power outage, you might be able to recover unsaved comments using built-in auto-recovery features.
Most modern PDF editors temporarily cache your changes while you work. If the program terminates abnormally, it attempts to restore these changes the next time you open the application.
Launch your PDF editor immediately after the software or system crash. Do not open the file directly from your folders yet.
If a dialog box automatically appears asking if you want to recover unsaved changes or restore a previous session, click 'Yes', 'OK', or 'Recover'.
Once the document opens, check if your comments are intact. If they are, immediately go to 'File' > 'Save As' and save the document to a secure location on your drive.

Re-enter the Missing Annotations
If the document was closed normally and changes were discarded, the comments are permanently lost and must be manually recreated.
Use WPS PDF to Prevent Annotation Loss
WPS Office offers a robust, lightweight PDF editor with reliable saving mechanisms and a user-friendly interface. It ensures your comments, highlights, and notes are securely managed, reducing the risk of accidental data loss.
- 1. Open your PDF in WPS Office: Launch WPS Office, click on 'Open', and select your PDF file from your local drive.
- 2. Add your comments: Go to the 'Comment' tab to utilize text boxes, highlights, sticky notes, and shapes for your annotations.
- 3. Save securely: Click the 'Save' icon in the top left corner or use 'Ctrl + S' to ensure your annotations are safely stored in the document before closing.

Frequently Asked Questions
Can I recover PDF comments if I accidentally clicked 'Don't Save'?
Unfortunately, no. If you manually chose not to save the document when closing it, the PDF editor intentionally deletes any temporary or cached files associated with that session. The unsaved comments cannot be recovered and must be re-entered manually.
Where are Adobe Acrobat temporary files stored?
On Windows, Acrobat temporary files are typically stored in 'C:\Users\[Username]\AppData\Local\Temp' or 'C:\Users\[Username]\AppData\Roaming\Adobe\Acrobat'. However, these temporary files are often encrypted or unreadable directly and require the software's built-in auto-recovery prompt to restore them properly.
How can I prevent losing my PDF comments in the future?
To prevent data loss, develop a habit of saving your document frequently using the 'Ctrl + S' (Windows) or 'Cmd + S' (Mac) keyboard shortcut. Additionally, check your PDF editor's preferences to ensure any available 'Auto-Save' or 'Auto-Recovery' features are enabled and set to a short interval, such as every 5 minutes.




