How about adding an option in Xpose to separate polygroups from the same subtool and also for when the button is active, we can manipulate with the transpose and leave where we want and save in position. After depressing the button, the subtool returns to normal without changing the position. I was putting test joints here in basemesh and I thought it would be a good idea to be able to do this. Or is there some way I do not know ?!
