Scenario Variables are variables you can create and reference at the Scenario level. Scenario Variables can only be used in the Scenario they were created in. 

These variables can be viewed and managed within the Scenario Dashboard. The example below shows two variables that have been created.

Once a Scenario Variable has been created, you can double click to add a reference and select one or more Scenario Variables.

Note: To learn more about creating these variables, please see: How do I add a Scenario Variable?