In this Photofocus blog post I cover how you can create customized file name templates to suit all kinds of needs.
There are a few places where you can batch rename photos in Lightroom. The most common is during the import process via the File Renaming panel of the Import dialog, but you can also batch rename by selecting photos in Grid view of the Library module before going to Library > Rename Photos. A less often used option is to rename copies created via export via the File Naming panel of the Export dialog. In each of these scenarios you can gain access to the various file name templates that ship with Lightroom, or you can choose the Edit option and open the Filename Template Editor and create your own templates. Continue reading at Photofocus.