I started using what is supposed to be a metric format in my company.  The units were set to ips so I set those to mmgs.  No problem there and I'll have our superuser work on the drawing format file.

But in this case I'd like to use dual dimensions of mm/inch, as I work in the U.S. but our assemblies will be done in Mexico.   

But if I sect Dual Dimensions Display in Document Properties, I get mm/mm, not