Are you asking how to load them, or how to control them after loading?  To load them, you first load V4 from the Figures library, and then select the V4 figure, and load whatever morph from the Pose library (if you're new you can just load all of them until you learn which ones do what).

Normally you should control almost all those morphs from the Body, although you can control a lot of them from specific body parts (e.g. the chest has many of them).  A very few are controlled ONLY on specific body parts, e.g. toe bends.

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