By default any edits made to the HVAC Zone dialog will apply only to the current HVAC Zone. However it is often convenient to make the same changes to one or more other zones in the same HVAC Zone group. In this case ensure that the Save changes to which HVAC Zones option is set to 2-Multiple HVAC Zones and select the HVAC zones that are also to be targets for the changes.
Note: If you would like to change the default behaviour so that the equivalent objects in other HVAC zones in the same group are all ticked when dialogs are first opened then you should check the Target all HVAC zones in group by default Program option.