When I want to change the height of the arch of a curved line, I can only do that by manually changing the seperate nodes at the ends of the line. I have to be very precise to get a symmetrical curve. It would be very helpful if I can select multiple nodes (for instance by holding cntrl + click) to change multiple nodes at the same time. That way making a symmetrical curved line (which is desired in many cases creating a flowchart) becomes much easier.
