Hey Walter, is that AE2018 on Mac perhaps? I don’t see that feature in 2018 on win7. (a pickwhip for each attribute).
I’ve checked my columns and I can see the parent choice.
I do see it in 2019 PC however.
On another note related to Corner Pin. I’ve always found the AE corner pin way too soft. The CC powerPin creates a much sharper warp. They do work slightly differently from each other (CC has more features). I’m kinda shocked after all these years that the sharpness issue has never been addressed, but I suppose after spending good money on Cult, Adobe just let them carry the load while they focused on making icons even smaller.