                      FULL-SCREEN MODE

    It is sometimes useful, as in photographing or capturing
an  image,  to have the resolution corresponding to the full
screen.  There is therefore provided the feature  that  when
the  pointer  is  in  a  graphics  window  and the F1 key is
pressed, then the current graphics in  that  window  becomes
rendered  in  full-screen  mode.  Pressing the same key, F1,
while in the full_screen  window  causes  a  return  to  the
graphics window from which the full_screen mode was invoked.
All  graphical  features,  such  as  picking,   translating,
rotating and zooming, are retained in the full-screen mode.

                          THE END

