I have a drawing which has dimensions set to fractions at 1/16" precision.  In one drawing, I need to have a decimal dimension with tolerance for a machined surface.  I can't find any way to change just that dimension.  If I change the document settings, they all change, and the properties dialog doesn't seem to have any way to change the primary units of just one dimension.  How is this magic done in SolidWorks?  SW R2010, SP0.  Thanx.