Here you will learn about the concept of parts.
A “part” is a unit of grouping according to a character's components (e.g., eyes, nose, etc.).
Each is a folder and can be multi-tiered.
By having ArtMesh and deformers of the same part belong to the same part, it is convenient to show/hide, lock, select, and so on, part by part.
Also, display and other functions are controlled by part IDs even when the product is embedded.
Please refer to “Parts Palette” for detailed information on how to use the Parts Palette.