After you add a transition to your project and make adjustments to it, you can reuse it anywhere else in your project.
1. In Final Cut Pro, select a transition in the timeline.
2. Do one of the following:
• Choose Edit - Copy (or press Command-C), click the edge of a clip (an edit point) in the timeline, then choose Edit - Paste (or press Command-V).
• Hold down the Option key and drag the transition to another edit point.
If you copy a transition to an edit point that already has a transition, the existing transition is overwritten.