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ICOLOUR

Changes the colour table used to display images. It operates in the modes given below:

   DEFault    default table      GREY      select greyscale
   GREEN      green table        BLUE      blue table
   RED        red table          RAINbow   rainbow table
   RGB        3-colour table     NEG       invert current table
   NORM       switch off NEG     POS       same as NORM
   EDIT       interactive edit   READ      read external table
EDIT mode the RGB components of 16 colours equally spaced throughout the full range are displayed on the terminal screen. As the values of these are changed, the colours in between are interpolated and the resulting changes shown on the graphics display surface. In READ mode the name of an HDS object containing a colour table is specified.


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