Some embodiments provide a media editing application. The application places several committed media clips in a composite display area to specify a description of a composite presentation. In response to receiving a request to create a new version for a first media clip placed at a particular location in the composite display area, the application creates an audition set at the particular location in the composite display area. The application creates a second media clip from the first media clip. The application adds the first and second media clips to the audition set. At least one of the first and second media clips is a candidate media clip that is insertable at the location in the composite display area but is not a media clip that has been committed for inclusion in the description of the composite presentation.