Reference a Newly Created Screen Field Without Leaving the Screen Editor
Where: This change applies to Lightning Experience and Salesforce Classic in Essentials, Professional, Enterprise, Performance, Unlimited, and Developer editions.
How: Suppose that you want to create a picklist screen field to ask users to select their favorite ice cream flavor. If they select Other from the picklist, a text screen field allows them to enter the flavor manually. Build both screen fields in a snap without ever having to leave the screen editor.