round off dimensions in NX ?

I had the question from one of my users, : Is it possible to round off a drafting dimension, say 4635 to 4600 [mm]  ?
( relative large objects, buildings.)

I replied that if he would dimension in meters instead of millimeter, then he could set the number of decimals to accomplish that.  : 4.635m   ->  4.6m
But, He wants millimeter.  

Is it possible ?

Regards,

 Tomas