In a dual-monitor setup, moving a window on the left screen to the right side will have a (small) "block" when the window aligns with the left screen's right border. This is useful to position a window at the right-hand side of the left screen.
Now, my left monitor is my primary screen so I have the panels on the left-hand screen. Moving the mouse to the top-right corner where the user menu including logoff/shutdown is, is not so easy because unless I navigate very carefully I usually end up with my mouse on the right screen and have to backtrack.
Is there a feature (I am using gnome3, btw) that allows me to set up some kind of border between the two screens so that it will take just a little bit more effort to move the mouse from left to right screen?