[Trisquel-users] Upper-Right Keyboard Buttons

[det31995]

There are four confusing buttons on the upper-right of the keyboard of the  
Gentoo Penguin. There are two words on each button. The top words (NumLk,  
Pause, Ins, Del) work well, yet I cannot figure out how to use the bottom  
words (ScrLk, Break, PrtSc, SysRq). I am really irritated that I cannot use  
PrtSc. How do I access it?