Summary: I wish I could use negative values for length parameters

Description:
For example

A curtain wall panel has 4 predefined reference planes. Sometimes I would like geometry to be a little bit bigger or smaller than that. Either one is not a problem because you can just add a reference plane. Add a parameter to it and you can controle the distance, but this parameter can only have a positive value. This means that the reference plane you are trying to controle can only remain of one side of the first reference plane.

It would be nice if you could check a box that would say that the parameter may accept negative values.


Product and Feature: Revit Architecture - Architectural Family Contents/Components

Submitted By: daniel gijsbers on 12/12/2013