Animation > IK > Set Rest Pose

Creates a pose to serve as a neutral position for an inverse kinematic skeleton before you start to animate.

Choose Animation > IK > Set Rest Pose to open the Rest Pose Options box:

Rest Pose Options

Hierarchy: None – Sets a pose for selected joints only.

Above – Sets a pose for selected joints and all joints above them.

Below – Sets a pose for selected joints and all joints below them.

Both – Sets a pose for selected joints and all joints above and below them.
Joints: Used – Sets a pose for all joints that have been transformed.

All – Sets a pose for every joint in the skeleton.
Pose: Rotation – Sets a pose for rotation parameters.

Translation – Sets a pose for translation parameters.

Both – Sets a pose for both rotation and translation parameters.