So, I just got this idea because I both like to see what a piece of gear would look like on current transmog, but I also want the ability to easily not confuse the current item's look with anything else I'm currently wearing. Using a modifier key seems like a great way to do this.

The edited screenshot above is my mockup of the idea.

I was able to add this quickly, though it won't redress the model if you press or release the modifier while the tooltip is visible.

Ooo nice! Much appreciated. I'm gonna study that commit to see if I can learn a little more about WoW addon development and this addon in particular. Also, looking forward to jumping back into the game to check out this change.