Exit full screen terminal

Accidently, I entered full-screen display in the terminal. I now can't get out of the full screen display back to normal display.

How can I do this?

Solution 1:

Press the key F11. This is the typical full screen button for most ubuntu programs, like image viewer and Firefox / Google Chrome.

You may have (but this is unlikely) accessed tty. If the above doesn't work, try Ctrl+Alt+F1

Solution 2:

Here is another way, in case @Tim's answer doesn't work for some reason. Right click in the terminal, then click "Leave full screen".

Solution 3:

None of the above worked for me.
Try pressing the right control key and the letter c:

right ctrl + c