The Samsung Galaxy Tab has the ability to take a screenshot built into the unit. Just follow these easy steps and you’ll be able to capture your screen to an image file and save it to your SD card.
1. Navigate to the screen you wish to capture.
2. Press and hold the Escape/Back button.
3. Continue holding Escape/Back, then press the Power button two times. You should hear the sound of a shutter click to confirm the shot was taken.
4. Open the Gallery app.
5. A folder named ScreenCapture will be available and it will contain your Galaxy Tab screenshot image.