An override redirect window is not under the control of the window manager.
This means it won’t have a titlebar, won’t be minimizable, etc. - it will be entirely under the control of the application. The window manager can’t see the override redirect window at all.
Override redirect should only be used for short-lived temporary windows, such as popup menus. GtkMenu uses an override
redirect window in its implementation, for example.
| this |
a toplevel Window |
| override_redirect |
true if window should be override redirect |