Control menu

Controller

Tag as Controller
Marks the selected object as an animation controller. Click a rig controller and select Tag as Controller to create a Controller node connected to the rig controller object.
Parent Controller
Designates the selected objects as Controllers and makes the last selected object Controller parent. For example, if you have a hand with a joint chain for a finger, select a finger joint a bit below, and one above it. Select Parent Controller to tag both joints as controllers, with the higher finger joint becoming the parent of the joint below.

HumanIK

Create Control Rig
Creates a Control rig for your character. For more information, see Create a Control Rig.