The RBC Rig Panel contains 3 tabs: Set Up, Tuning, and Controls. The rig list at the top of the panel selects which RBC rig you are working on (the same list as in RBC Scene > Collection).
Set Up: This tab allows you to set up and rig the RBC Rig to your vehicle model.
Tuning: This tab allows you to customize and fine-tune your RBC Rig.
Controls: This tab allows several ways to control your RBC Rig.
Tip: Shift+Click the tab buttons to show more than one tab at the same time.
Note: Tuning and Controls are only available after the rig has been generated. Until then they show "Set Up and Generate Rig First".