Everywhere you go, any building you enter, any OS you operate, any settings window you open, one rule remains set in stone, “THE ESCAPE DOOR”. Always give an exit path, a way to make it all go away, make it look like nothing happened. But Gnome seems to think otherwise. Any settings window you open, all you see is a “close” button.
I made a few changes and then tried to “undo” them by using the following methods: