I am running Ubuntu on a Chromebook via Crouton. As my keyboard does not have a Print Screen key, and I would like to take A screenshot, I am unsure of what to do.
I am using the Xfce interface, and I would like to take a screenshot of a LibreOffice drawing so as to change my background.
shutter
the advanced screenshot program, choose capture window and select needed window in this program. It also can capture selected area of screen.