Markus, Many thanks for your reply, there is just one thing that maybe i didn't quite explain myself clearly enough. So this is what i am trying to achieve.... Isodraw will automatically put an arrowhead on a line in ratio to the linethickness used (small arrowhead on a thin line, & a big arrowhead on a thick line). What i wanted to do was to have the same size arrowhead regardless of which line thickness i use. (see attachment). I can only achieve this by drawing a thin line with arrow and then place a thicker line over the top of the leader.
