> When ever I use a lot of a particular adaptation of a "Dia primitive" I will do cuts and pastes to get more of them. For more involved groups that I wish to reuse I have a couple of other diagrams I drop them in to copy from. Ctrl-C and Ctrl-V works, so it it is easy. I never found the shape creation very intuitive or well documented (in older versions) so this is my workaround.
I actually have a dia file called useful_lines and that is always open when I'm working. I have saved a variety of lines that are sometimes hard to make and do indeed cut and paste from that. The 8 hard right angle lines I made yesterday have been added.
Thanks-
Jim Clark