The Scenario Domain Receivers Pane displays all Receivers for Scenario Domains. It can be used to enable or disable Receivers for a Scenario and to add a Reference. 

Click on a Scenario Domain Receiver to select it within this pane. 

Enabling and Disabling Receivers

The Enable/Disable Receiver Pane can be used to enable or disable a Receiver for the Scenario. 

When a Receiver is disabled, it will not have a checkmark. 

How to Add a Reference

A Reference can also be added to a Receiver. Double click on the Reference field to add a reference. 

Select a Tab (e.g., Domain Attributes, Global Variables, Organization Variables, Organization Attributes). Click on the Plus icon to select an item to reference.