EU -- Enhancement utility
   EU COLORS
   EU DEL name
   EU LIST string
   EU MAKE lo hi bcolor ecolor bframe eframe
   EU MAKE lo hi bcolor ecolor <keyword>
   EU MAKE lo hi blo bhi glo ghi rlo rhi bframe eframe
   EU MAKE lo hi blo bhi glo ghi rlo rhi <keyword>
   EU REST name bframe eframe
   EU REST name <keyword>
   EU SAVE name
   EU TABLE name
Parameters:
   COLORS | lists the defined colors
   DEL | deletes a saved enhancement
   LIST | lists the saved enhancements (def=lists all enhancements
          on the workstation)
   MAKE | sets the enhancement
   REST | restores a saved enhancement
   SAVE | saves the current enhancement
   TABLE | lists the values of an enhancement (def=current)
   lo/hi | limit/threshold values of visible brightness; range is
           0-255 (def=0)
   rlo/rhi | limit/threshold values of red gun intensity; range is
             0-255 (def=0)
   glo/ghi | limit/threshold values of green gun intensity; range is
             0-255 (def=0)
   blo/bhi | limit/threshold values of blue gun intensity; range is
             0-255 (def=0)
   bcolor/ecolor | color name range (see COLORS option)
   name | enhancement name (def=default enhancement)
   string | list only the enhancements beginning with this character
            string (def=none)
   bframe/eframe | beginning and ending image frame (def=current image
                   frame and bframe)
Keyword:
   LOOP=Y | applies enhancement to frames in loop (def=N)
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