The IK rollouts contain controls for interactive IK and the HD IK solver.

The rollouts on this panel are:
Inverse Kinematics Rollout (Interactive, Applied, and HD IK)
Object Parameters Rollout (HD Solver)
Auto Termination Rollout (Interactive IK)
Note: The rollouts for the HI IK and IK Limb solvers are not available while IK is chosen in the Hierarchy panel. Most controls for these solvers are found on the Motion panel.