My Huge Chewing Masseter Muscle is Gone!!!

I use to had a huge chewing muscle. I had botulinum toxin many years ago. However, every time after injected botulinum toxin, my jawline has "gone". I told Dr.Lao I don't like my large square face but I want to keep my jawline. He explain to me detailly why did that happen to me before, and also customize my injection treatment. now i got my V shape and lovely jawline~~~~