Users of the FREE edition are limited to one zone per project. If you wish to survey a new area, you will need to create a new project for it. Go to Survey > New on the top menu bar.
Users of the PRO and Enterprise editions can have multiple zones within each project. To add a zone, open your Project (if it’s not already open) and click on Plus Sign on the bottom-left of the NetSpot window. Or select Survey > Zone > Add Zone from the top menu bar. Then give your new zone a name and select whether you want to draw or upload the map for it. You can switch between zones by clicking on the Zone drop-down menu on the bottom-left of the window.
To duplicate a zone, you can use Zone Snapshots if you are a PRO user.
To permanently delete a zone (and the map that goes with it), select Survey > Zone > Remove from the top menu bar. When it asks you if you are sure you wish to remove the zone, click Yes.