Some embodiments provide a computer readable medium storing a media editing application for creating multimedia presentations. The application includes a graphical user interface (GUI). The GUI includes a composite display area for displaying a portion of a timeline to which multimedia clips are assigned to create a composite media presentation. The timeline is divided into user-defined segments. The GUI includes an outline window for displaying a list of selectable items representing the user-defined segments, the selectable items for use in applying various operations to the user-modifiable segments. In some embodiments, the various operations include operations to insert a new segment into the timeline, to merge at least two segments into one segment, to hide a particular segment from view, to focus on a particular segment or group of segments in the composite display area, as well as other operations.