Apple Final Cut Pro X (10.1.2) - Manual (Page 121)

Chapter 7 Edit your project 121
The result is effectively an insert edit: the former connected clips are inserted in the primary
storyline and subsequent clips ripple right to make room for the new clips.
Note: You can drag clips from and to the primary storyline as long as there are no clips
connected to them. If there is a connected clip, you must first move or remove the connected
clip or use the Lift from Primary Storyline or Overwrite to Primary Storyline command.
Move clips from and to the primary storyline without rippling the project
You can move clips from and to the primary storyline without affecting the total duration of
your project.
1 Select the clips you want to move.
67% resize factor