Many thanks for that. I have managed to create the black lead using poly line solid which seems to be okay. However I now can't actually create the window I need. I have modelled it in Sketchup and have attached an image but it doesn't import as a symbol. I understand a number of people have had the same issue. Also I read that Chief imports only inch units. UPDATE - whilst writing this reply I decided to play a little more before tapping the send key and lo and behold it imports fine if you tell Chief it is a door. All I had to do was change the default dimensions, remove all the casings and hardware and change the materials. It isn't perfect but it's very close so I now declare that a victory. Shame I can't import it as a window but I'll put up with that. Again, thanks for the help.