Overlay clips : Adding clips to overlay tracks
 
Adding clips to overlay tracks
Drag media files to the Overlay Track on the Timeline to add them as overlay clips for your project.
To add a clip to the Overlay Track
1 In the Library, select the media folder that contains the Overlay clip that you want to add to your project.
2 Drag the media file from the Library to the Overlay Track on the Timeline.
Note: You can also use color clips as Overlay clips. To add more tracks, see Adding and swapping tracks.
3 To customize the Overlay clip, select the clip and edit it interactively in the Player panel preview window, or open the Options panel, and modify the settings.