To take screenshot on Samsung Galaxy Tab is very simple as compare to other Android devices. Its just a one step process, for which you do not require any special app or root access to your Android Galaxy tab.
Take Screenshot on Galaxy Tab
To take screenshot press “Power” and “Back” buttons simultaneously and you will hear a photo capturing sound.
Now, go to “ScreenCapture” folder on the microSD card of your tablet and see, your screenshot is saved there.