Customizing the Control rig hierarchy
To customize a Control rig hierarchy:
In the Viewer window, switch to Schematic view (Ctrl-W).
Click in the Schematic view, then press F to frame the hierarchy.
Press P to activate Parenting mode.
Re-parent any of the Control rig effectors by selecting the nodes that represent them and dragging them to a parent.
Tip:Turn on Auto Arrange as you re-parent effectors so you can see the hierarchies you are creating. In the Schematic view, right-click and select Auto Arrange.