The way you take screen shots will depend upon how old your phone is and what type of OS it is running.
 If you have 4.0 (Ice Cream Sandwich) or higher, a screen shot function is built in for easy use.
 Navigate to the image on your screen that you would like to capture.
 Simultaneously press the "Power" button. Wait for the screen to flash and say the image was saved.

Read your device's operating instructions.
Look in "Settings" and "About" to learn about the OS your Android system is running.
Return to the home screen.
Press the "Volume Down" button.
Find your screen shot in your image gallery.
{"src": "wikihow-all_test", "title": "How to Screen Capture4"}