How to Adjust Screen Brightness in PDF Reader Pro for Android?

Setting an appropriate screen brightness is a way to protect your eyes in different reading environments. And you can do as follows:

1. Open a file and enter the reading page;

 2. Click More icon  ;

3. If you turn on Auto Brightness, your reading background brightness will follow system brightness;

4. If you want to adjust the brightness, you can slide the brightness bar, and Auto-Brightness will turn off automatically.