How to use services in Mac OS X | Macworld
OS X services are hidden productivity features that let you borrow functions from other applications without leaving your current program—for example, selecting text in a word processor and using a service to instantly create an email or add it to a note-taking app. The Services menu is context-sensitive and appears in the app menu or right-click menu, showing only relevant options based on what you've selected. You can customize which services appear in System Preferences and create keyboard shortcuts for frequently used ones to streamline your workflow.