Negative Measurement Toggle Button that makes the items within it Negative

Hey guys any interest besides myself for a negative item toggle or button. Currently just multiplying my formula by -1 but it would be nice to have button to select that makes the measurement and items within the measurement negative for easy viewing. I am always backing out items from the base takeoff. With the -1 I can only do the items under the measurement as negative, but it would be nice to make the item negative too so I can see if that item is negative and has negative items within it without opening the item.

Thanks guys - the new version is great. Love the Version Control. It is saving me so much time keeping up with all the new revisions that are coming in with moving the takeoff automatically.