> Will constructions lines be able to "stick" in the next version?

No, I probably won't be able to do this for a while. I would like to eventually make it possible for them to stick around after the current command by hitting some option, but there are a few complications that go along with that.

Probably they should stay more in the background and not interfere with selecting other objects, but on the other hand there also has to be some way to select them so you can delete them at some point.

If you do need a more permanent line that will last through more than one command, right now you have to just draw a regular line for that...

- Michael