I've been trying to use the Morphing Tool in P7 to create morphs to help me out with some poke-through in clothing on some poses but I always have the same problem - I select the clothing item and its proper actor (in this case, the left collar on the Alicism shirt), I select the Custom Morph tab of the morphing tool and then I try to click on the correct area in the shirt and it always registers the click on the V4 model rather than the shirt since her polygons are poking through the shirt that I want to select.

How can I keep the selection on just the shirt without having to make the figure invisible (as once I do that I don't have a reference on what I'm fixing anyway)?