To see the list of all your zone files, after you have logged into your Gandi account and clicked on “My Account” where you will see your list of domains by default, click on “DNS Zones” to see them like this:

To create a zone, click on the “Create a zone” button

You can use the other icons to see the list of attached domains, see the contents of the zone, and delete the zone. You can add more options in the table if you want.