In Mac OS X, some applications provide "services" that let you quickly use content from one application with another application. The content may include text, graphics, pictures, or movies.
The services appear under the Application menu in the Services submenu. (See Figure 1.) The Application menu assumes the name of the current application.
Figure 1 Application and Services menus for Stickies
In some cases, the active application may not work with all or some services.
For example: The services for Grab are available in Stickies and TextEdit but are dimmed for Terminal because Terminal is not able to accept the graphic data from Grab.
In other cases, specific services may appear dimmed or not available. For example, TextEdit will be dimmed when in Stickies if there is no text selected. A particular service may also be dimmed if you have selected content that doesn't work with the service.