How to Invert PDF Colors in the Android

1. Unlock your Android device and open the application launcher. Tap the 'Market' icon and then tap the magnifying glass to open the search bar. Type 'PDF Reader' and press 'Enter.' Select APV PDF Viewer, ezPDF Reader or RepliGo Reader from the list.

2. Touch the 'Download' button at the top of the screen. Tap 'Download and Install' and then wait for the app to install on your device. When it's done, tap 'Open' to launch the application.

3. Browse to the PDF file that you want to view using the APV PDF Viewer. Tap the name of the file on your Android device's SD card to open the PDF. Touch the 'Menu' button and tap 'Options.' Tap 'Color Mode' and touch 'Inverted Color.'

4. Find the PDF file you want to read using ezPDF Reader. Tap the file to open it. Press the 'Menu' button and then tap the 'T' in the upper right corner to enter the text-reflow mode. Press 'Menu' again and tap the three dots in the lower right to bring up more options. Scroll down and tap 'Night Mode' to invert the colors to white text on a black background.

5. Open the PDF file you want to read in RepliGo Reader. Tap the name of the file on your SD card to open the PDF. Touch the top of the PDF page and tap the button in the upper left corner to move to the flowing-text mode. Tap at the top of the screen and touch the button second from the upper left corner to activate the inverted color viewing mode.