How to Fix Choppy PDF Scrolling on Nexus 6P Android
Question details
The user needs to resolve an issue where scrolling animations lag or appear less smooth while navigating documents on a mobile device.

- Product
- Adobe Acrobat Reader or alternative mobile PDF viewers
- Device & OS
- Nexus 6P running Android 7.1.1 Nougat
- Scenario
- Swiping to scroll through pages in a PDF document on an Android mobile device.
- Observed behavior
- Scrolling animations appear choppy, sluggish, and drop frames, making the reading experience uncomfortable.
Before attempting to fix the issue, restart your Android device to clear the temporary memory, and test a native app like Google Chrome to check if the choppy scrolling happens only in your PDF reader or across the entire operating system.
Isolate the Issue and Clear PDF App Cache
Determine if the performance drop is isolated to your current PDF application and clear its temporary cache to restore smooth rendering.
PDF applications can accumulate heavily fragmented cache files over time, especially when handling high-resolution graphics or large text files. Clearing this cache often eliminates the stuttering effect during scrolling.
Navigate to your Android device's main Settings app and tap on 'Apps' or 'Application Manager'.
Scroll through the list of installed applications and select your primary PDF viewer, such as Adobe Acrobat Reader.
Tap on 'Storage', then press the 'Clear Cache' button. Do not tap 'Clear Data' unless you have backed up your local files.
Relaunch the PDF application, open the problematic document, and swipe up and down to see if the animation is now smooth.

Optimize Android System Resources
Free up CPU and RAM on your Nexus 6P to ensure the device has enough processing power for fluid animations.
Experience Smooth PDF Reading with WPS Office
If your current PDF application continues to lag, WPS Office offers a highly optimized, lightweight mobile document viewer designed to deliver seamless scrolling and fast rendering, even on older Android devices.
- 1. Download the App: Open the Google Play Store on your Nexus 6P or Android device and search for WPS Office.
- 2. Launch and Grant Permissions: Install and open the application, then follow the on-screen prompts to allow file access so the app can locate your documents.
- 3. Open Your Document: Tap the 'PDF' tab on the home screen to instantly filter and display all local PDF files.
- 4. Enjoy Smooth Scrolling: Tap your desired file to open it and swipe through the pages to experience optimized, lag-free scrolling animations.

Frequently Asked Questions
Why does my PDF lag only when I scroll quickly on Android?
Fast scrolling forces the application to render multiple pages and high-resolution images in rapid succession. If the device's RAM or processor cannot keep up, the system drops frames, resulting in a laggy or choppy animation.
Will clearing my PDF app cache delete my saved documents?
No. Tapping 'Clear Cache' only removes temporary data that the app uses to load faster. Your downloaded PDFs and personal files remain untouched on your device storage. Avoid pressing 'Clear Data', which resets the app completely.
Can older Android versions like 7.1.1 still run modern PDF viewers smoothly?
Yes, but performance depends heavily on the specific app's optimization. While some heavyweight applications might struggle, installing a lightweight alternative like WPS Office ensures smooth document viewing even on legacy Android systems.




