Allow the user to optionally select 2 colour values to represent the line. <FlexibleLine version="2" id="SKY:FlexibleLine:00c9b154-eed9-4a26-aff0-6206dc63bea6"> <Name>df</Name> <Presentation> **<Colour>FF0000</Colour> <BackgroundColour>FFFFFF</BackgroundColour>** </Presentation> </FlexibleLine>
