A number of programs in OS X include a hidden menu that offers some extra functions. These are generally not intended for use by the end user, but there are times when these features can be useful. For instance, there's a debug menu in Disk Utility that lets you enable viewing hidden partitions to better manage volumes and disks.
Similar to Disk Utility, a debug menu exists in the Contacts program for managing your Address Book database, which offers a couple of useful features.
To enable the debug menu, simply open the Terminal utility (in the Applications > Utilities … Read more