You may recall that Safari has a debug menu that enables some hidden features, but did you know Address Book also has a debug menu?
In Address Book's debug menu, you can get options for logging, controls for metadata, printing selections, and removing orphaned images. You can enable this debug menu by typing the following command into Terminal.app (/Applications/Utilities):
defaults write com.apple.addressbook ABShowDebugMenu -bool YESIf you no longer wish to have this menu hanging around, you can remove it by typing the same command above, but replace "YES" with "NO."
Want more tips and tricks like this? Visit TUAW's Terminal Tips section!