Bound to keyboard shortcuts and it works great. For example, I bound Alt-PrtSc to capture the active window using "scrot '/tmp/%Y-%m-%d_$wx$h_scrot.png' --focused --exec 'pinta $f'" -- saving the file to /tmp and launching the image in Pinta for tweaking.
No idea how to start it. Typing "scrot" into a terminal does nothing. Scrot is not listed among installed software in the menu.
Best screenshot tool available for Linux!