Once you have a deformation chain created, you can optimize its positioning to fit the element it will deform. This task is done in the Setup Mode . The Setup Mode lets you set the resting position of the deformers to make sure it is at the optimal position.
The Bone and Articulation deformers have different sets of controllers:
|•||Setting up a Bone and Articulation Chain|
|•||Optimizing the Skeleton|