Lip Squash rollout - to stretch/squash the lips
Bones of the upper and lower lips are able to stretch/squash depends on directs position - this creates an effect of stretch/squash of the lip itself. Bones are shown in the lists both with the weights for effect. Bones of the upper lip are shown in the top list, bones of the lower lip - in the bottom list. When you pick items in the list, appropriate bones are selected in the scene. Get Selected Mouth Bone From Scene button highlights in the lists bones selected in the scene. After you pick bones in the lists, you can change the effect weights of them by their Weight spinners.