Well, META+Return is the standard binding for fullscreen, and this should place the window back where it came from.Another question: Alt+F11 will put a window into a fullscreen mode. If the window was on Desktop 1 before, now it is on Desktop 0. Is this the default?
ie. when the window is in fullscreen it will be placed on a new workspace. When you switch back it should be moved to its origianl position.
-- Ole Jørgen Brønner