; GR2CHAN
;---------------------------------------------------------------
;! specifies a second TV graphics channel to be used
;# ADVERB TV
;-----------------------------------------------------------------------
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;;  Associated Universities, Inc. Washington DC, USA.
;;
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;-----------------------------------------------------------------------
GR2CHAN   LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
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GR2CHAN
Type: Adverb  (Real)
Use:   TV graphics channel to use.  GR2CHAN is used when two
       graphics channels need to be specified.  XAS supports 8
       graphics channels the last of which is used as a black
       background.  Note that the graphics channels may be on or off
       separately, but they scroll together.
Verbs:
  DELBOX......Verb to delete boxes with TV cursor & graphics display.
              GR2CHAN is used for boxes about to be deleted.
  DFILEBOX....Verb to delete Clean boxes with TV cursor & write to file
              GR2CHAN is used for boxes about to be deleted.
  GRBLINK.....Verb which blinks 2 TV graphics planes
              GR2CHAN gives the second plane to be blinked
  TVANOT......Verb to load anotation to the TV image or graphics
              GR2CHAN is used for the background
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