Hello. I'm a Revit user in S.Korea.
I'm now making a new room tag family (Family Category : "Room Tag" from generic annotations template)
And the problem can be explained with the image below:
There's no problem making a label/parameter "pyung",
but there is a problem applying the formula "Pyung = Area / 3.3"
I couldn't find a way to apply the formula at Family Types Window.
I have also thought for another solution,
: Make shared parameter "Pyung" in Project, and use the parameter as label parameter.
But still, as far as I know, there's no way of applying formula between shared (project) parameters.
Desparately looking for a solution, would be grateful if one give any.