screen capturing or "print screen" | #howto

"Apps" at yellowmug website

for capturing or "print screen" as called in MS Windows, many ways in Mac:

by shortcuts function;
A-command-shift-3: capture screen to file
B-command-fn-shift-3: capture screen to clipboard
C-command-shift-4: capture selection to file
D-command-fn-shift-4:
E-capture selection to keyboard

Also there are awesome free-wares "Apps" at yellowmug website for photos editing.

have fun