fullscreen mode in xfce4

[Dieter Wilhelm]

Hi

I'm running xfce4.  When I start my first Emacs frame with the option
--fullscreen it works like a charm.  But I'd like to open other frames
in the same session in fullscreen mode as well.  How can I achieve
this?  The window manager offers his own maximise method but then I
still have a window manager frame around my Emacs frames 8-(.
-- 
    Best wishes

    H. Dieter Wilhelm
    Darmstadt, Germany