I am trying to use spot elevation in Revit Arch 2011 to change the elevation of the component (for example, a footing).

However, in the Properties dialog the value of the spot elevation is grayed out so I can’t change it. In the modeling window I also can’t change the value of the spot elevation.

I used spot elevation feature to change the elevations of the components in Revit Arch 2010.
Any suggestions of what I might be doing wrong? Or Revit 2011 does not allow the change of spot elevations any more?

Thanks.