I have SW2009 v1.0. In assembly, I am trying to edit a partand have the other parts be transparent as I have done in otherversions of SW. My problem is in options, display/selection, under"Assembly transparency for in context edit" it is grayed out. Notable to select anything. If I go to individual parts it is notgrayed out. Can anyone give me some help on this.

Thanks
SolidworksAssemblies