VMS Help  —  PEEK  Watching  Init and Finish Sequences, Keywords  GR
  The GL and GR keywords take one of the following keyword values:

     G0, G1, G2, G3.           E.g. CHARACTER_SET=(GL=G0,GR=G2).

  GR=G1 outputs "<ESC>~".
  GR=G2 outputs "<ESC>}".
  GR=G3 outputs "<ESC>|".
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