Register a Control so that you can quickly view and track it under Registered Controls on the Risk Register. Navigate to the Risk Register at the top. On the right hand side, select Add Controls to Register.

This will open a modal that displays all of the Controls in Account Settings: system-defined and custom. Filter by one or more tags at the top to locate the Controls. 

Check the boxes to add Controls to your Risk Register.

Select Submit to register your control.

You can assign any Control to a Threat; however, they won’t appear under Registered Controls until they’ve been registered.