Clarify nonzonal plan behavior

Author: johndowns

articles/app-service/environment/configure-zone-redundancy-environment.md

@@ -122,9 +122,14 @@ To see whether an existing App Service Environment supports zone redundancy:
 
 ## Configure Isolated v2 App Service plans with zone redundancy
 
-All App Service plans created in an App Service Environment must use the Isolated v2 pricing tier.
+After you enable your App Service Environment to be zone redundant, you can also make each Isolated v2 App Service plan as zone redundant.
+
+> [!NOTE]
+> Each plan has its own independent zone redundancy setting, so you can manually enable or disable zone redundancy on specific plans in an App Service Environment.
+>
+> You can scale an individual plan down to a single instance and disable zone redundancy, if that specific plan doesn't need to be zone-redundant.
 
-If you enable your App Service Environment to be zone redundant, you can also set the Isolated v2 App Service plans as zone redundant. Each plan has its own independent zone redundancy setting, so you can manually enable or disable zone redundancy on specific plans in an App Service Environment, as long as the environment is configured to be zone redundant.
+All App Service plans created in an App Service Environment must use the Isolated v2 pricing tier.
 
 - **To create a new Isolated v2 App Service plan with zone redundancy**, use the Azure portal, the Azure CLI, or Bicep.