Renaming files in OS X is a fairly simple affair. Simply click a file name to select it, then click again (don’t double click!) to make the name editable. However, when you’re working with a file in your favorite app, a trip to the finder to rename it, or a trip to the Duplicate function may not fit within your workflow. It’s also just annoying. Why not just mess with the file directly from the file itself. Say,t he title bar? Well, in Mountain Lion, you can.