Stuck Maximised

[Jonathan Allen]

On Fri, Apr 03, 2015 at 02:21:43PM +0200, bitlord wrote:
> > 
> > Going to maximise thunderbird on a graphic screen session, I
> > accidentally clicked on the box next door and it maximised to being
> > absolutely full screen, with no top bar and all the normal desktop
> > stuff obscured.  I can still switch tasks using Alt-Tab, in which
> > case the top bars and the desktop (I'm using Xfce) reappear for the
> > other task(s).
> > 
> > How can I get thnderbird back to have a normal task appearance?
> 
> F11?

F11 has no (apparent) effect.  Neither do F9-F12.  Alt-F11 starts
Tomboy, so in a sense gets access to the desktop top bar (as opposed
to thunderbird's top bar), but closing that goes back to the stuck max.

Jonathan