The document discusses the navigation bar and buttons in Adobe Premiere Elements 13 that are useful for video editing. It describes the first two buttons as undo and redo buttons. The next button is the organizer button, which can be used to organize and select clips to edit into a movie. The tools button contains options like adjustments to edit clips and change things like brightness and lighting. The audio mixer button allows editing of audio levels for each audio clip, such as lowering the volume of background audio or changing the volume of an audio clip over time.