The Avid system represents each edit and effect in a graphical Timeline structure to help you track and manipulate the elements of your sequence. In addition, the Timeline has its own set of editing tools that you can use to create and revise edits and transitions across multiple tracks.

The audio and video tracks in the Timeline play in the Composer monitor. You can continually edit your sequence and review your changes in the Composer monitor until you are pleased with the result. These features are described in the following sections: