Fix Highlights Disappearing in Adobe Acrobat Reader on Android
Question details
The user needs to prevent PDF highlights and annotations from disappearing after closing the document or when syncing via Dropbox.

- Product
- Adobe Acrobat Reader
- Device & OS
- Android
- Scenario
- Adding highlights and annotations to a PDF file stored in Dropbox using an Android tablet.
- Observed behavior
- Highlights and annotations fail to save, disappearing after the file is reopened on the Android device, and they do not synchronize reliably with a computer.
Ensure your Android device has a stable internet connection if you are opening and syncing files directly from a cloud storage service like Dropbox. Verify that you have sufficient internal storage space available to save local copies of your annotated documents.
Manually Save Annotations and Update Acrobat Reader
Ensure changes are explicitly saved before exiting the document and keep the PDF application updated to fix known bugs.
PDF applications sometimes fail to auto-save annotations when interacting directly with cloud storage APIs. Manually confirming your edits helps force the save state.
Open the Google Play Store on your Android device, search for Adobe Acrobat Reader, and install any available updates.
Open your PDF file and apply the necessary highlights or text annotations.
Immediately after finishing your edits, tap the checkmark icon located in the upper-left corner of the screen to explicitly save the changes.
Wait a few moments before closing the document to ensure the save process completes and registers with your cloud storage provider.

Troubleshoot Dropbox Synchronization Issues
Fix potential sync conflicts between the PDF viewer and Dropbox cloud storage that cause data loss.
Annotate and Highlight PDFs Securely with WPS Office
If Acrobat Reader continues to lose your highlights, switch to WPS Office. WPS provides robust built-in PDF editing tools for Android, ensuring your annotations are securely saved locally or seamlessly synced across devices without unexpected data loss.
- 1. Install WPS Office: Download and install WPS Office from the Google Play Store on your Android device.
- 2. Open your PDF: Launch the app, navigate to the 'Files' tab, and open the PDF document you wish to edit.
- 3. Apply highlights: Tap on the 'Tools' menu at the bottom, select 'Annotation', and use the 'Highlight' tool to mark your text.
- 4. Save securely: Tap the 'Done' or 'Save' icon in the top toolbar to securely write the annotations to your file, whether stored locally or on WPS Cloud.

Frequently Asked Questions
Why do my PDF annotations disappear when opening files directly from Dropbox?
This often occurs because the cloud storage app has not finished uploading the modified file before the PDF viewer is closed. If a sync conflict happens, Dropbox may accidentally overwrite your newly highlighted file with the older, unedited version from the cloud.
How can I ensure my PDF highlights are permanently saved on an Android tablet?
Always explicitly confirm your edits by looking for a checkmark, 'Done', or 'Save' button in your PDF editor after making changes. Avoid closing the app abruptly, and ensure you have an active internet connection if saving to a cloud service.
Can I recover lost highlights from a PDF on Android?
Unfortunately, if the PDF application failed to write the annotations to the file before closing or crashing, the highlights cannot be recovered. It is highly recommended to save manually frequently and test the save function on a duplicate file first.
Does clearing an app's cache delete my saved PDFs?
No, clearing the app cache only removes temporary background data to resolve performance or syncing issues; it will not delete your saved PDFs or personal documents. However, do not click 'Clear Data' or 'Clear Storage', as this may reset the app completely and delete locally stored offline files.




