Okay,
Firstly, tilt your head down until you are able to see your keyboard.
Secondly, if not allready, slightly move your head to the right of the keyboard.
Thirdly, locate the PrtScn button.
Fourthly, PRESS THE BUTTON.
Fifthly, well, there is no fifthly, you have pretty much taken a screen shot.
CONGRATULATIONS!
~ 000