I'm not an expert, but it's not like Photoshop where you can right click on an object and that layer gets selected. . . I never found it so anyway. I just do it where I click the layers on and off and when it disappears, that's the one. If you have a very layered image in progress that could slow you down for sure. On the other hand, you can keep a layered copy alive in Photoshop for finding that out -- if your computer has the power to keep them both open simultaneously. But that's all depends on whether that's practical in your context or not.
Personally, I just click it on and off within AR.
"Not a bit is wasted and the best is yet to come. . ." -- remembered from a dream