You can run Grabilla to take a screenshot from keyboard with some shortcut hotkey combination of your choice.
To make this you must to locate Grabilla’s shortcut in your Start menu. Press right mouse button on Grabilla’s shortcut and select Properties. Select Shortcut tab. Then move your cursor in Shortcut key field and press the key of your choice.
Then press OK and you’re done.
Now you can launch Grabilla by pressing this shortcut on your keyboard.