As long as you have Animation Sources in the Time Editor, you can create animation clips with them on animation tracks. An animation source appears in the Outliner or the Sources menu in the Time Editor menu bar Sources menu any time there is curve-based animation in Maya.
To create a clip from an Animation Source already in the scene
The Animation Source is added as a clip to your scene,
You can also middle-mouse drag an Animation Source from the Outliner onto an Animation track in the Time Editor. The folllowing animation shows the Sven character being animated by a series of different animations in the Outliner Sources menu.