You have the ability within the deploy options section, to do solely constructive changes (add), destructive changes (subtract) or both. Use the Deploy Type picklist to make your selection (see screenshots below).
Once you deploy or validate, Essentials will warn you that you are about to do a destructive deployment:
This screenshot shows how it looks when Standard & Destructive changes is selected:
Use the Delete column check boxes for destructive changes:
Essentials will summarize the number of components that will be deleted:
