I'm pretty sure the default is Ctrl+Left and Ctrl+Right, but I've customized it so many times I can't be completely sure. OS X actually allows a lot of customi

I'm pretty sure the default is Ctrl+Left and Ctrl+Right, but I've customized it so many times I can't be completely sure. OS X actually allows a lot of customization. You assign a keyboard shortcut to any menu item in System Preferences -> Keyboard -> Shortcuts -> App Shortcuts.