Other PDF Issues

Fix Adobe Acrobat Reader Freezing When Marking Up PDFs on iPad Mini 2

Phi Hung Vo Oct 19, 2026 868 views

Question details

The user needs to resolve an issue where Adobe Acrobat Reader becomes completely unresponsive when attempting to annotate a PDF.

How to Fix Adobe Acrobat Reader Freezing When Marking Up a PDF on an iPad Mini 2

Product: Adobe Acrobat Reader
Device & OS: iPadOS / iOS (iPad Mini 2)
Scenario: Using PDF markup features such as the highlighter or commenting tools.
Observed behavior: The application freezes and gets stuck as soon as the user tries to mark up the PDF document.

Before you start

Before attempting any fixes, please identify if the freeze happens immediately upon opening the document or specifically when selecting a certain markup tool like the highlighter.

Solution 1Recommended

Restart the App and Your iPad

Clearing the application from the device's memory and performing a hard restart often resolves temporary software glitches causing the freeze.

Older devices like the iPad Mini 2 have limited RAM. Continuous usage without clearing background apps can lead to memory exhaustion, causing resource-heavy applications like Adobe Acrobat to hang during complex tasks.

Force Close Acrobat

Double-click the Home button to open the App Switcher, then swipe up on the Adobe Acrobat preview to force it to close.

Restart the iPad

Press and hold the Top (Power) button until the power off slider appears. Drag the slider, wait 30 seconds for the device to turn off, then press and hold the Top button again to turn it back on.

Reopen and Test

Launch Adobe Acrobat Reader again, open your PDF, and try applying a highlight to see if the freeze is resolved.

Solution 2

Check Storage Space and Update Software

Low available storage or outdated application versions can significantly degrade performance and cause freezing on iOS devices.

Solution 3

Isolate the Issue to a Specific PDF or Tool

Determining whether the issue is systemic or related to a specific file helps in deciding the next steps or reporting the bug accurately.

Free Microsoft Office alternative

Try WPS Office for Smooth PDF Markup on iPad

If Adobe Acrobat Reader continues to freeze on your older iPad, consider switching to WPS Office. It is a highly optimized, lightweight productivity suite that handles PDFs and Microsoft Office documents effortlessly, even on devices with limited hardware resources.

1. Install the App: Search for WPS Office in the Apple App Store and download it to your iPad.
2. Open Your PDF: Launch WPS Office and navigate to your files to open the PDF document you need to edit.
3. Mark Up Smoothly: Select the 'Annotation' tools from the top menu to freely highlight, draw, and add comments without freezing.

Smooth and lightweight PDF annotation tools, preventing lag on older iPadsFully compatible with standard PDF and Microsoft Office formats (Word, Excel, PowerPoint)Free to use for basic PDF reading, highlighting, and commentingFamiliar, user-friendly interface for seamless migration

microsoft office alternative - wps office

Frequently Asked Questions

Why does Adobe Acrobat Reader freeze on my iPad Mini 2 but not on my phone?

The iPad Mini 2 is an older device with an A7 chip and only 1GB of RAM. Modern versions of Adobe Acrobat are optimized for newer hardware, so applying complex markup layers can easily overwhelm the older iPad's memory, causing it to freeze.

Can a corrupted PDF file cause the reader app to crash?

Yes. If a PDF contains complex formatting, unoptimized images, or corrupted code blocks, the application may get stuck in an endless loop trying to render the markup over those elements, resulting in a complete app freeze.

How do I report persistent bugs to Adobe Support?

You can reach out to Adobe Support through their official website or community forums. For the best assistance, provide your iPad model (Mini 2), exact iOS version, Acrobat App version, and the specific markup action (e.g., using the highlighter) that triggers the freeze.

PDF Troubleshooting