Last year Google introduced a new editor for Google Documents. The new editor included a bunch of new formatting and collaboration features. Those features only applied to newly created documents. Documents that you created prior to the launch of the new editor did not have the new formatting. Today, Google announced that you can transition documents created in the old editor to the new (current) editor. This option will appear when you open an older document. When you open an old document you’ll be presented with the option to transition. For now this transition option is not available for Google Apps customers.