If you set it lower than 10 seconds it still remains onscreen for 10 seconds. Except if you set it to 0 it gives you a dialog box that remains onscreen until you dismiss it instead of the momentary notification. (Currently on xenial.)
If you set it lower than 10 seconds it still remains onscreen for 10 seconds. Except if you set it to 0 it gives you a dialog box that remains onscreen until you dismiss it instead of the momentary notification. (Currently on xenial.)