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say "PV will plot bitmaps and/or contours of all or selected position-velocity"
say "planes. Only xv and vy cuts are available for now."
say "* Cube name is controlled by character variables NAME and TYPE."
say "* Plotting of header and color table are controlled by "
say "  logical variables DO_HEADER and DO_WEDGE [YES or NO]"
say "* Plotting the label and using absolute or relative coordinates are"
say "  controlled by logical variables DO_LABEL and DO_RCOORD [YES or NO]"
say "* Plotting the contour levels and filling them are controlled by"
say "  logical variables DO_CONTOUR and DO_GREY [YES or NO]"
say "* Planes are marked according to variable MARK"
say "        [POSITION or CHANNEL] (CHANNEL means plane number)"
say "  Adding a mask behind the marks is crontrolled by logical variable"
say "  DO_MASK [YES or NO]"
say "* Size and location of the X or Y range to be plotted are controled by"
say "  variables CENTER and SIZE"
say "        [SIZE[1] = SIZE[2] = 0 ==> whole map]"
say "        [X-range limits: CENTER[1]+SIZE[1]/2 CENTER[1]-SIZE[1]/2 arcsec]"
say "        [Y-range limits: CENTER[2]-SIZE[2]/2 CENTER[2]+SIZE[2]/2 arcsec]"
say "* Sampling of the X or Y axis is controled by variable SAMPLING [arcsec]"
say "* Spacing of contour levels is controlled by variable SPACING "
say "        [>0 ==> levels equally spaced by the value of SPACING]"
say "        [=0 ==> automatic determination]"
say "        [<0 ==> manually use LEVEL command]"
say "* Colour Scale is controlled by variable SCALE[2] "
say "        [a b ==> linear scaling between a and b]"
say "        [0 0 ==> use of map extrema ]"
say "* Current input values:"
say " "
say "  DO_HEADER [" 'bold''do_header''norm' "]   DO_WEDGE [" 'bold''do_wedge''norm' "]"
say "  DO_COVERAGE [" 'bold''do_coverage''norm' "]  DO_DIRTY [" 'bold''do_dirty''norm' "]"
say "  DO_LABEL [" 'bold''do_label''norm' "]    DO_RCOORD [" 'bold''do_rcoord''norm' "]"
say "  MARK [" 'bold''mark''norm' "]   DO_MASK [" 'bold''do_mask''norm' "]"
say " "
say "  DO_CONTOUR [" 'bold''do_contour''norm' "]  DO_GREY [" 'bold''do_grey''norm' "]"
say "  SPACE_TYPE [" 'bold''space_type''norm' "]  SPACING [" 'bold''spacing''norm' "]"
say " "
say "  SIZE [" 'bold''size[1]' 'size[2]''norm' "]        CENTER [" 'bold''center[1]' 'center[2]''norm' "]"
say "  SAMPLING [" 'bold''sampling[1]' 'sampling[2]''norm' "]"
say " "
say "  Map name is " 'bold''name'.'type''norm'
!
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