You may use the Custom Shortcuts available in Keyboard Settings to capture screenshots using Shutter with different key combinations.
Open System Settings and click on Keyboard.
Next, switch to the Shortcuts tab, select Custom Shortcuts in the sidepanel and click on the + icon to add a new one. In the dialog that pops up, give a name so that you would be able to quickly recognize it later on and the command which you wish to run when the keyboard shortcut gets activated; and click Apply.
I have put "Snap with Shutter" as Name and
shutter -f as the Command. (
shutter -f captures the full screen, for other available commands, refer to
CAPTURE MODE OPTIONS given in
This would create an entry with the name you provided and shortcut as "Disabled" (since you haven't yet provided one to it). To bind a shortcut to it, click on the "Disabled" text and hit the shortcut keys you would wish to bind to it. It it succeeds, the key combination would be visible to you, otherwise it would ask you to provide an another one.