In most of my use cases, screenshot the whole screen causes too many sensitive information being recorded. I think it would be good if a clipping function to be added in the dom0 screenshot function or add a VM screenshot function in Qubes Manager column at top right corner.
There already is such a function in xfce4-screenshooter. It just don’t have shortcut by default.
Open Q → System Tools → Keyboard.
Move to the Application Shortcuts.
Press the Add button.
In the Command field enter:
Then press your desired shortcut key combination.
Also there is Screenshot panel item that you can add in tray.