How to add a new zone to Gen1

We have a Gen1 (16 zone) in place for the past 2 years with 2 zones programmed and running. We are trying to add a third zone for our new citrus tree. However, when I click on Setup Zones I can only see the two current zones. Can’t figure out how to add a third zone. Any insights?

We also installed a Gen2 (8-zone) in July, and when I click on those zones, i can see 6 additional zones to setup.

Thanks for any insights you may have.

Tina B.

I believe that same screen with Set Up Zones should have a Show Disabled option.