Thanks for your question. That's not currently possible in MD, so it's a feature suggestion (and, oddly, one we've never had before AFAIK). Wondering a bit about how this would work (you can comment on this answer, perhaps): so if you tweak the subcontrol it's always being moved relative to where the supercontrol is when you move it?
If/when we do implement this, would you be interesting in helping to test?
This might take a few months to happen, please note.