Hi @,
How can I draw a centerline between two concentric arcs?
If that’s not what you want then be more specific in you question.
Or better show a screenshot with your drawing.
Hi Xdrakosha,
thanks for your answer and video, but that’s not what I meant.
I want to add a centerline between the two concentric arcs of the elbow, see below.
But I could not figure out how to do that. I could only add centerlines between the two lines of the cylindrical part.
Make another circle and change it to a construction line
Can you show your sketch? Or at least draw line that you need on the image so I can understand that is the problem.
Or maybe this helps more 
Thanks guys,
I know how to do it while sketching, but I need it on the 2D drawing.
I added the centerline shown in red I would like to have on the drawing.
Sorry for confusion, I thought I was clear when I mentioned in the topic “2D drawing”
My bad. Misunderstood you
No problem, I appreciate your efforts 