How to actually disable F11 global fullscreen on Lubuntu?

Sep 16, 2026

  1. Open your file manager, go to /home/<username>/.config/openbox and open rc.xml with a text editor.
  2. Find the line, or tag with F11 in the value. For example:
<keybind key="F11">
  <action name="ToggleFullscreen"/>
</keybind>
  1. Comment out <action name="ToggleFullscreen"/>.
  2. Log out or restart the PC.