Chagall Reference   Toner                 12.5.93
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   The 'Toner' is a reversely transparent and evenly
   working colouring tool with a sharp edge. This 
   means that this tool will draw only where at
   least one colour component (red, green or blue) 
   is darker than the Toner's colour.

   If the Toner colour has been selected by an 
   <Alternate>-click from the current picture, 
   the painting mode remains reverse transparent.

