HVAC Duct takeoff not centered about branch

[paul_mep]

Hi,

Looking at the attached image, the first case is a takeoff pointing down attached to the main duct in light blue.

The second image is what I would like to do (edited graphically in MS Paint to demonstrate the desired end result): have the takeoff not centered about the duct to which it is connected. Is this possible? Am I missing something obvious?

Thanks,
Paul