The HP Touchpad includes the ability to take a snapshot of the active screen. Other tablets, such as Android tablets, don’t include this function and you have to actually “root” the device to be able to take a screen capture. Silliness.
To do this on the HP Touchpad:
Tap the Power and Center buttons at the same time.
You’ll receive a confirmation onscreen that the screen capture was successful.
To view your current, and any, screen captures, goto:
Launcher-> Photos and Videos ->Screen Captures
NOTE: Do NOT tap and HOLD the power and center buttons. This will reboot the Touchpad.