aaah, that makes sense, I can see that logic, although I thought the tool would allow multiple fill spaces or atleast not track fillspace if fill is unselected, I can see that when I stop and start by adding again its ridding its previously stored calculations, I wanted to scribble a continuous line, but wanted to stop to see where Im going too, the run around is to sketch it on paper first then I can just do one constant line from there...cheers.