I was fooling around in the keyboard shortcut section, and accidentally changed the HUD's shortcut from Alt L to Mod 2 + Alt L.
Now, whenever I hold and even press the alt key, HUD will pop up. I don't have the option to hold the alt key, and then press F4 to close a window.
How can I get this back to normal? Every time I try too, I can never get the shortcut back to just Alt L.
Best Answer
You can use CompizConfig Settings Manager to change the key used to show the Unity HUD.
To open terminal hit Alt+Ctrl+T and run following command:
sudo apt-get install compizconfig-settings-manager
Or search for 'compizconfig-settings-manager' and install it from there.
Once installed, Hit Super key (Windows key) to open Unity dash and search for "ccsm" and open it.
In CompizConfig Settings Manager Navigate to
Desktop
>Ubuntu Unity Plugin
Under the Behavior tab click on little cross in front of "Key to show the HUD", This will set the key to default (Alt)