Some embodiments provide a media-editing application with novel editing tools. The media editing application provides an in-line precision editor that can be opened in the composite display area. In some embodiments, a selection of an edge between two clips expands a composite lane into two lanes, a first lane and a second lane. The first lane is then used to perform edits to the left side of the selected edge, while the second lane is used to perform edits to the right side of the selected edge. In some embodiments, the first lane shows the additional media content available for the clip on the left side of the edge to include. The second lane shows the additional media content available for the clip on the right side of the edge to include. The additional media content is in the source media file, of which a clip represents a portion.