To take a screenshot on my Android device, please hold the Volume Down and the Power buttons together for 1-2 seconds. The screen flashes white. Your device captures the entire screen and saves it as a photo.
Alternatively, you can hold at once the Home and the Power buttons for 1-2 seconds. And your device captures the entire screen.
You may then send that by e-mail or upload it on any website you would like to.
