text: /****************************************************************************
     return.c 2.15 - return from multi-band display mode
     The return command returns the user from the multi-band display mode
     (entered through disp) to the single-band-with-graphics mode.
  ****************************************************************************/
  #include <stdio.h>
  #include "spam.h"
  disp_return(buf)
  unsigned char *buf;
  {
      if (display_mode==0) {
  	printf("You're not in display mode.  Type \"help\" for help.\n");
  	return;
      }
      vddispln(&unit,&c4);			/* disp all planes again.   */
      vdflush(&unit);
      display_mode=0;				/* reset mode flag.         */
  }
  