RST: Did you know?

Revit Structure, did you know that you can attach a framing elevation to a reference plane that has been given a name?
Most everyone knows that framing elevations *want* to attach to a grid. And you can create a copy of a framing elevation and lose the 'datum' attachment, thus requiring assigning a workplane if you try certain things like putting in a brace.
But placing a framing elevation based on a named reference plane could be the trick to use in some circumstances... like a framing elevation not based on a grid!