How do you align a parts three planes to the assemblies three planes on initial insert into an assembly

SF 2007-12-17

How do you align a parts' three planes to the assembliesthree planes on initial insert into an assembly? The part alwaysseems to randomly float in space with no connection to theassemblies x,y,z plane or it's created x,y,z plane. I always haveto break the fixed postion and align it to the the planes myself soI can use the cross section view correctly.Solidworks Assemblies