✅ 1. Make Sure the File Is Editable
Annotations may not work if the file is locked, read-only, or scanned without OCR.
Try opening another PDF to see if tools work there
✅ 2. Enable Annotation Mode
Tap the Edit or Annotate icon in the top/bottom toolbar.
Select the appropriate tool (e.g., Pen, Highlighter, Note).
Try annotating again.
✅ 3. Update the App
Go to the App Store → Tap your profile → Scroll down and update A1 PDF Editor, if listed.
✅ 4. Check for iOS Updates
Some iOS versions may cause tool glitches.
Go to Settings → General → Software Update and install any available updates.
✅ 5. Reinstall the App (if needed)
⚠️ Backup your important files if sync is off before uninstalling.
Delete A1 PDF Editor, then reinstall it from the App Store.
If annotation tools still do not work after these steps, please contact A1 PDF Editor Support from within the app for personalized help.