Formula 'Not'

When you are creating formulas in your Revit family and you have 2 visibility parameters and you want these 2 parameters to work opposite to one another, this means that when one is ticked the other isn’t and vice versa.

You could go down the path of creating elaborate ‘if’ statements to apply these conditions or you could use a simple ‘not’ statement.

If Parameter A is ticked then Parameter B will be automatically unticked.

Untick Parameter A and Parameter B is ticked automatically.