gnome-shell super maximize

Ctrl-Alt-Enter

• This is a two way toggle. Type it once to "super maximize". Type it again to un-"super maximize".
• In gnome-shell this will maximize the currently focused window to the point that its titlebar will not be seen.
• It will only do this to the Terminal (including xterm).
• I've hit this by accident a few times but didn't know how to undo it, so I'm logging it here should I forget.
• It's not listed on Gnome.org Keyboard Shortcuts or my first 5 Google results.