AIPS HELP file for DODARK in 31DEC26

As of Sat May 9 13:40:20 2026

HELP SECTION

DODARK
Type:     Adverb   (Scalar - generally logical)
Use:      Plot programs are able to draw "dark" as well as "bright"
          vectors.  The dark ones are normally drawn to provide
          contrast when the background grey-scale image is strong.
          DODARK is used to control whether the dark vectors are drawn
          in a different color than the corresponding bright vectors.
          When writing to the TV with DODARK > 0, the dark vectors
          are drawn in the black overlay graphics channels.  When
          writing to a plot file, darks vectors are just a different
          operation code than bright vectors.
Tasks:
   GREYS.........Make a grey-scale plot with contours.  DODARK functions
                 only when DOTV > 0.
   KNTR..........Make a grey-scale, contour, and polarization vector
                 plot with multiple panels.  DODARK functions only when
                 DOTV > 0.
   LWPLA.........Convert a plot file to PostScript for saving and/or
                 printing.  DODARK > 0 makes dark vectors appear black
                 (actually PLCOLORS(1,5)-PLCOLORS(3,8)).  You may want
                 DODARK false when making color vectors and/or coloring
                 the image.
   PCNTR.........Make a grey-scale, contour, and polarization vector
                 plot.  DODARK functions only when DOTV > 0.
   TVPL..........Display a plot file on the TV.

EXPLAIN SECTION