On Windows there’s key that’s usually on the upper-right of your keyboard that says something like Print Screen or Prt Scrn or similar. Pressing that will take a screen shot and copy it to your clipboard. You can then paste that into any photo editor or even a word processor. From there you can edit, print, etc.
To get a higher resolution of the screen shot hold the Windows key while hitting the print screen key.
-mac
Superior Drummer 3 version: 3.1.6 Operating system: Windows 10
Cubase Pro, Korg Kronos, M-50, Hammond XK-1c, Toontrack SD3, EZBass w/lots of expansions, many VSL Vi's, Shreddage 3 everything, and shit-tons of FX plugins.