Remove unwanted shortcut gnome classic

Solution 1:

To remove this icon, alt+right-click on the icon and click remove in the menu.

Solution 2:

Now it's Windows+Alt+rightclick (a.k.a. Super+Alt+rightclick) as described here. In a few years, it'll be shift+ctrl+super+alt+numlock+middleclick.

Solution 3:

Actually it's compiz that add the Windows key to the Alt+Rightclick combination. You can test this by killing it. Compiz needs Alt+Rightclick for something else apparently.

Gnome classic session: Windows+Alt+Rightclick

Gnome classic session, no effects: Alt+Rightclick

Non-Noetherian ring with a single prime ideal [closed]

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