Yes, navigate to locations.
Click on delivery zones in the location detail view.
You can add a zone by clicking add a zone and drawing a polygon. You'll be able to edit each point you draw after you create your zone. DO NOT DRAG. CLICK AND RELEASE. You must click on each point to create a new corner until you've completely encapsulated your delivery zone.
You can add delivery fees to each zone.
A zone may have a delivery area inside of it, but not overlapping it. If a zone is inside a zone, the smaller zone will take priority.