!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
if spacing[1].eq.spacing[2]  let spacing[2] 'spacing_rule%c' 
!
say "SHOW will plot bitmaps and/or contours of all or selected channels"
say " "
say "  Display the header       "'ansi%blue'"DO_HEADER"'ansi%none'"   [" 'bold''do_header''norm' "]   "
say "  Display a color wedge    "'ansi%blue'"DO_WEDGE"'ansi%none'"    [" 'bold''do_wedge''norm' "]     "
say "  Plot bitmaps             "'ansi%blue'"DO_BIT"'ansi%none'"      [" 'bold''do_bit''norm' "]         "
say "  Add the clean beam       "'ansi%blue'"DO_NICE"'ansi%none'"     [" 'bold''do_dirty''norm' "]     "
say "  Add the UV coverage      "'ansi%blue'"DO_COVERAGE"'ansi%none'" [" 'bold''do_coverage''norm' "]  "
say "  Add the dirty beam       "'ansi%blue'"DO_DIRTY"'ansi%none'"    [" 'bold''do_dirty''norm' "]     "
say "  Display the labels       "'ansi%blue'"DO_LABEL"'ansi%none'"    [" 'bold''do_label''norm' "]     "
say "  Display contour levels   "'ansi%blue'"DO_CONTOUR"'ansi%none'"  [" 'bold''do_contour''norm' "] "    
say "  grey-scale contours      "'ansi%blue'"DO_GREY"'ansi%none'"     [" 'bold''do_grey''norm' "] "
say "  Better marks             "'ansi%blue'"DO_MASK"'ansi%none'"     [" 'bold''do_mask''norm' "]          (Hide image behind channel marks)"
!
say " "
say "  Channel range            "'ansi%blue'"RANGE"'ansi%none'"       [" 'bold''range[1]''norm'  'bold''range[2]''norm' "]         in 3rd axis unit, [0 0] ==> all"
say "  Channel label            "'ansi%blue'"MARK"'ansi%none'"        [" 'bold''mark''norm' "]    [VELOCITY, FREQUENCY or CHANNEL]"
if box_limits.eq." " then
say "  Displayed velocity range "'ansi%blue'"SPAN"'ansi%none'"        [" 'bold''span[1]' 'span[2]''norm' "]         in km/s"
say "  Displayed field size     "'ansi%blue'"SIZE"'ansi%none'"        [" 'bold''size[1]' 'size[2]''norm' "]         "'box%sunit' 
say "  Field center             "'ansi%blue'"CENTER"'ansi%none'"      [" 'bold''center[1]' 'center[2]''norm' "]         offset "'box%sunit'
else
say "  Box limits               "'ansi%blue'"BOX_LIMITS"'ansi%none'"  [" 'bold''box_limits''norm' "] (user specified box limit)"   
say "                           (use LET BOX_LIMITS "" "" to use SIZE, CENTER and SPAN instead)"  
endif
say "  Cross size at center     "'ansi%blue'"CROSS"'ansi%none'"       [" 'bold''cross''norm' "]           in arcsec, 0 ==> none "
say "  Fields layout            "'ansi%blue'"DO_FIELDS"'ansi%none'"   [" 'bold''do_fields''norm' "]          (for Mosaics)"
say " "
say "  Colour Scale range       "'ansi%blue'"SCALE"'ansi%none'"       [" 'bold''scale[1]' 'scale[2]''norm' "]         [0 0] ==> all dynamic"
say "  Contour levels           "'ansi%blue'"SPACING"'ansi%none'"     ["  'bold''spacing[1]'" "'spacing[2]''norm'"]       [Value Unit] [0 0] ==> Guess"
say "  Spacing type             "'ansi%blue'"SPACE_TYPE"'ansi%none'"  ["  'bold''space_type''norm'" ]         [LIN, LOG or USER]"
!   [AUTO, EXPO, NATIVE, NOISE, or USER]"
!say "                         [SPACE_TYPE = "AUTO"  or  SPACING =0 ==> automatic determination]"
!say "                         [SPACE_TYPE = "EXPO"  and SPACING >=0 ==> logarithmic levels]"
!say "                         [SPACE_TYPE = "NATIVE"  and SPACING >0 ==> levels equally spaced by the value of SPACING units]"
!say "                         [SPACE_TYPE = "NOISE" and SPACING >0 ==> levels equally spaced by the value of SPACING sigmas]"
!say "                         [SPACE_TYPE = "USER"  or  SPACING <0 ==> manually use LEVELS command]"
say "  Automatic colour scale "'ansi%blue'"SHOW_COLOR"'ansi%none'"  ["  'bold''show_color''norm'"] " 
!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
