To delete one or more zones from your scenario:
Open the list menu in the upper left corner of the List panel and select the Zones option. The Zones list opens.
Select the check box beside each zone you want to delete in the grid, and then click the Delete button on the List panel toolbar. Alternatively, click the More button in the upper right corner of the List panel and select the Delete Zones option. The zones are deleted immediately (no confirmation required).