Interesting question. Recently I discovered a new feature and I want to share it with you.
SIMPLE:
The letter F needs to be a seperate parameter. I have used the Name parameter. Than you can sort the schedule on this name by displaying the flag at this parameter in the schedule fields.
I have attached a simple xml file which you can import in your scheme settings.
EXTRA:
Then I took it a step further and developed a small object. This object has 3 parameter which variable names are exactly the variable which exist in the zone-object. The object can be used to place on your terrace. It holds the same letter as the corresponding zone. In the parameter Room Area you will insert the area manually.
Setup the schedule-criteria in which it will show all zones and 'terrace-objects'.
In the field add with 'additional parameters' the parameter of the 'terrace object'. Sort it by name and sum it by area.
I will attach the object, xml and images. (AC13)