I know it's stupid to ask... But how do u do a screen cap?

I think I know what your talking about.
I was waiting for some one else to answer, since I figured it would be too much typing, but I'll do it anyways.
Go here:
link
It should tell you.
of just simply look it up on google. That's how I learned to do it XD
If u still don't get it, ask me again, I don't mind typing if u really need help.

press PRTSC SYSRQ on ur keyboard, then go to paint and save.