Timeline and transport controls
The following elements appear below the Timeline. They control video placement, playback and Timeline display.
The Timeline, viewing, and transport controls
 | Media viewing area View your video content in this area. |
 | Timeline View the locations of markers, playback, thumbnails, scripting commands, leading and trailing videos, and edit points. |
 | Timeline viewing buttons Use these controls to quickly zoom in or out of the Timeline and to view edited segments. |
 | Add Source at Start button Click this button to add media to the beginning of the current clip. |
 | Playback controls Monitor duration and control playhead location. |
 | Editing buttons Use these buttons to create and remove edit points and remove clipped segments from the Timeline. |
 | Add Source at End button Click this button to add media to the end of the current clip. |
