How to Restore the Original Font in an Edited PDF Document
Question details
The user needs to revert a PDF to its original font after changing it to Arial resulted in unreadable Latin characters.

- Product
- PDF Editor
- Device & OS
- not provided
- Scenario
- Editing a legal PDF document and modifying its text font.
- Observed behavior
- The Latin characters became unreadable after the font change, and the original font character mapping was lost upon saving.
Check if your PDF editor is still open. If you haven't closed the document yet, you might be able to simply use the undo function before resorting to file recovery methods.
Recover an Earlier Version of the PDF
Since saving a PDF permanently alters character mapping, the most reliable way to restore the font is to locate an unedited version.
Once a PDF is saved with new fonts, the original character encoding is often lost. Acrobat and other PDF editors cannot reliably restore the original font or character mapping directly within the software once the file is closed.
Search your email attachments or your device's downloads folder if the original PDF was sent to you by someone else.
Access your cloud storage (like Google Drive, OneDrive, or Dropbox), locate the file, right-click it, and select 'Version history' to restore a state prior to your edits.
Look through your local system backups (such as Windows File History or macOS Time Machine) or your company's document-management system for a copy saved before the edits were made.

Undo the Font Change in the Active Session
If you have not yet closed the PDF editor, you can easily revert the text back to its original state using the undo command.
Safely Edit and Manage PDFs with WPS Office
WPS Office provides a robust PDF editor that allows you to safely modify text, swap fonts, and utilize cloud backups to prevent permanent loss of your original formatting.
- 1. Open your PDF: Launch WPS Office and open your target PDF document.
- 2. Edit Text Safely: Click on the 'Edit' tab and select 'Edit Text' to modify fonts without breaking document layouts.
- 3. Enable Cloud Backup: Save your document to WPS Cloud to automatically keep a secure version history for easy restoration.

Frequently Asked Questions
Why do characters become unreadable when changing fonts in a PDF?
This happens because the original character mapping and encoding embedded in the PDF are not always fully compatible with the new font, especially when dealing with special or Latin characters.
Can I use the 'Undo' command if I have already saved and closed the PDF?
No. Once a PDF editor is closed, the session history is cleared. You cannot use the Undo function and will need to rely on file recovery methods or backups.
How can I safely change fonts in a legal PDF document?
Always create a duplicate of the file before editing. Use a professional PDF editor to change the font, and thoroughly review the document for encoding errors before saving the final version.




