The ability to rename a document using the Save As… function was one of the biggest complaints about Lion. The omission (and replacement by Duplicate) was one of the most annoying changes in Cupertino’s Nanny-knows-best document filing revolution. While the much-loved item has not magically appeared in the menus of Mountain Lion, there is a now quick way of getting it back. This article on TUAW gives you a step-by-step guide to returning to Save As bliss.