Flameshot looks interesting. Also, if you're using gnome 3 (standard ubuntu, in my case) the screenshot tool extension is great. https://extensions.gnome.org/extension/1112/screenshot-tool/
PrintScr: Whole screen to png in pictures folder Shift+PrintScr: Drag box over area to screenshot Alt+PrintScr: Screenshot the window, with a transparent box shadow around it Adding ctrl to any of those puts it on clipboard instead of pictures folder
Ctrl Shift Alt R records a 30 second webm of the desktop
Very good to know!