Main Size to Vent/Drain Size Quick Switch?

It is a bit of a pain to go from a main size to the vent/drain size and then back again to place to correct valve tag. Has anyone come up with a quick toggle to do swap the sizes?

SaturnV

In plant you can manipulate the spec and sizes from the command line, but I don't recall finding anything in pid to easily toggle that. I thought every time you inserted a reducing component, it switched, so, just insert another reducing component and have it switch back, then erase the extra part?