The facial rest pose is the default expression your character’s face assumes when there is no specific facial expression applied. The rest pose consists of a closed mouth, open eyes, and eyebrows that are at mid-level.

Whatever shapes you need, the first shape you should create is the rest pose (Shape 0). You can then start with a copy of the rest pose as you create all of the other shapes your project requires. The following figure shows the face in a rest position consisting of a closed mouth, open eyes, and eyebrows at mid-level.

Face in a rest position