glutShowOverlay,  glutHideOverlay  -  shows  or  hides the
       overlay of the current window

SYNTAX

       void glutShowOverlay(void);
       void glutHideOverlay(void);

DESCRIPTION

       glutShowOverlay shows the overlay of the  current  window;
       glutHideOverlay  hides  the overlay. The effect of showing
       or hiding an overlay takes place  immediately.  Note  that
       glutShowOverlay  will  not  actually  display  the overlay
       unless the window is also shown (and even a  shown  window
       may  be  obscured  by other windows, thereby obscuring the
       overlay). It is typically faster and less resource  inten-
       sive  to  use these routines to control the display status
       of an overlay as opposed to removing  and  re-establishing
       the overlay.

SEE ALSO

       glutEstablishOverlay, glutShowWindow

AUTHOR

       Mark J. Kilgard (mjk@nvidia.com)