Hey thanks! I followed the calculation for the zones, and came up with 0.52 for the bigger of the two - which is pretty darn close to 0.44-0.48 ! Glad it all hangs together.
The other zone came in with 1.2 in/hr which seemed high - and then I remembered I had an old fixed nozzle buried under a hedge which needs like NO watering at all, ever. So I capped that sprinkler head and again, the calculated result came in at around 0.56.
Many thanks for weighing in - my yard is configured such that reading the water meter and doing the calcs is pretty straightforward - so I’m happy to be able to go through the “proper” procedure for Advanced Settings.