New features in SolidWorks 2012 for Drawings are : Improvements in drawing revision process - Changed dimensions are highlighted with different color & previous values are also shown to help in revision process. New Context sensitive menu for faster work. Exploded views are automatically populated in View pallet so you have to just drag & drop. New Sequential balloon order feature. Automatically created magnetic lines hold balloon perfectly with each other at the time of position edit. Adding center mark to hole got faster.
In the following video you can view these new features in detail