adding a translucent layer

[mikiet]

Hi, I am creating a thematic map by using a classitem and expression in my
class , the result looks good, however underneath this layer is a raster
layer that I would still like to see. Is there any way of making the layer
translucent.

Here is what I currently have in my map file

LAYER
NAME Districts
TYPE POLYGON
STATUS ON
CONNECTIONTYPE OGR
CONNECTION "C:\MapBase\Districts.TAB"
TEMPLATE "ffff"
#STYLEITEM "AUTO"
CLASSITEM "HydrantCount"
CLASS
      NAME "1to3"
      EXPRESSION /[1-3]/
      COLOR 255 0 0
      OUTLINECOLOR 255 0 0
      BACKGROUNDCOLOR 255 0 0
END
CLASS
      NAME "4to6"
      EXPRESSION /[4-6]/
      COLOR 0 255 0
      OUTLINECOLOR 0 255 0
      BACKGROUNDCOLOR 0 255 0
END
CLASS
      NAME "7to9"
      EXPRESSION /[7-9]/
      COLOR  0 0 255
      OUTLINECOLOR  0 0 255
      BACKGROUNDCOLOR 0 0 255
END
END # Layer
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