Rigid Body elements of a character rig (shown with the silhouette of the character)
This mode makes visible physical elements of a character rig. These elements are known as rigid bodies, and they are used in the program to calculate physical simulations of character movements. Unlike other elements of the rig, rigid bodies have parameters such as mass and principal inertia moments which are used for physical computations. These parameters can be seen and adjusted in the Outliner window.
By default, rigid bodies are named RigidBody0, RigidBody1 and so on.
Point Controllers are also visible in this mode and can be used for editing character pose.