To edit a zone simply make any changes that you require within the 'Zone Details' or 'Countries' panels and click the ‘Update’ button at the bottom right of the screen.
You are free to edit the zone title - it will not affect the ranges and rates that are part of the zone.
When editing a zone you will see a third panel called 'Ranges'. This panel will list any Ranges that have been created for this zone.
In this section: