I am running Linux Mint, with Cinnamon 19. I accidentally pressed Super-O, and the following popup icon appeared:

enter image description here

Pressing Super-O again seems to 'toggle' the setting, now showing this:

enter image description here

I looked through all of the keyboard shortcuts listed in the keyboard preferences, but Super-O wasn't listed.

I want to find out what exactly Super-O does, and what is the default option, so I can put it back how it was?


Screen rotation on/off. Some laptops support it much like tablets and phones.

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