During design and detail process, we always have some changes along the way to make the complete product. The problem that we are facing is that we do not have an option to lock and keep existing barmarks.

Ex: I finish detail my construction drawing and send it to the checker, then it come back with some change with rebar, when I change the rebar, the barmark will change with the new rebar I put in.

I think we need to have the feature in the key in "proconcrete delete barmarks" that they can delete "unused barmarks only" so we can delete those unused barmark and replace that mark with the new rebar.