How do you take print screen on Samsung Galaxy Tab 2?

it is tricky but is possible.
gingerbread 2.3.5
Samsung

galaxy player 4.0

back and home key are the ones at the bottom that light up when touched they are the middle (home) and far right one (back)

touch back and home key the same time, hold
lift up and retouch home key, hold
right after that
lift up and touch back, hold
release all.

this is all done in less than two seconds, you might find that the task manager keeps popping up, and sometimes takes the screen shot with the task manager.

If done right it will take a screen shot... the screen will briefly shrink and the camera will make click sound. The screen shot will go in a folder named screencapture.

It is tricky but does work. I had to practice for over an hour to get the timming

right.