Fix PDF Underline Annotations Disappearing in Acrobat on iPad
Question details
Users experience underline markups and annotations disappearing after adding them to PDF documents in Adobe Acrobat Reader on an iPad.
- Product
- Adobe Acrobat Reader
- Device & OS
- iPadOS 13.7
- Scenario
- Reviewing and annotating a PDF document by applying underline markup to text using an iPad Pro.
- Observed behavior
- The underline markup successfully applies but later disappears from the PDF document when viewing or saving.
Verify that your iPad is connected to a stable Wi-Fi network to ensure there are no synchronization delays with Adobe Document Cloud that might cause annotations to fail to display.
Update iPadOS and Adobe Acrobat Reader
Software bugs related to PDF rendering are often resolved in the latest app and operating system updates. Updating ensures you have the latest bug fixes.
Compatibility issues between specific versions of iOS/iPadOS and Acrobat Reader can cause visual glitches where markups fail to render properly on the screen.
Navigate to your iPad's Settings application, tap on 'General', and then select 'Software Update'. If an update is available, download and install it.
Open the App Store on your iPad, tap your profile icon at the top right, and scroll down to the 'Available Updates' section. Tap 'Update' next to Adobe Acrobat Reader.
Reopen the affected PDF document in Acrobat Reader and check whether the previously missing underline annotations are now visible and saved correctly.
Test with a Local Copy on Desktop
Moving the file to a desktop environment helps determine if the markup data is actually lost or if it is just a display issue specific to the iPad app.
Recreate Annotations and Report the File
If the file's internal structure is corrupted, removing the glitched annotations and recreating them might bypass the error.
Annotate PDFs Reliably with WPS Office
Avoid disappearing markups and synchronization errors by using WPS Office for your PDF annotation tasks. WPS provides robust, stable, and highly compatible PDF editing tools designed to work seamlessly on your iPad.
- 1. Open the PDF in WPS Office: Launch the WPS Office app on your iPad and open the PDF document you wish to review.
- 2. Access Annotation Tools: Tap on the 'Annotation' or 'Edit' tab located in the top menu bar to reveal the markup toolset.
- 3. Apply Underlines: Select the 'Underline' tool, then drag your finger or Apple Pencil over the specific text you want to emphasize.
- 4. Save Your Changes: Tap 'Done' in the corner of the screen and hit the 'Save' icon to securely embed your annotations into the PDF file.
Frequently Asked Questions
Why do my PDF markups disappear immediately after I draw them on my iPad?
This is typically caused by a rendering glitch in the PDF viewer app, outdated iPadOS software, or a synchronization delay with cloud storage. Updating your software and saving a local copy of the file can usually resolve rendering failures.
Are underline annotations added in WPS Office visible in Adobe Acrobat?
Yes. WPS Office uses standard PDF formatting for all annotations and markups. Any underlines, highlights, or comments you add in WPS Office will be fully visible when the document is opened in Adobe Acrobat or any other standard PDF reader.
How can I recover PDF annotations that vanished on my iPad?
First, try opening the PDF on a desktop computer; sometimes the annotations are still saved in the file metadata but are just failing to display on the iPad app. If the document was synced to a cloud service (like iCloud or Adobe Document Cloud), you can also try restoring a previous version from your cloud version history.
