With the overlay options in iMovie, you can combine the video of one shot with the audio of another or even join two clips together in a split-screen effect. Overlays add professional flair and can be especially useful for creating instructive videos.
Create a split-screen clip. Scroll the timeline to position the playhead over the first clip you want to use in the split screen.
In the media browser, find the second clip you want to use. Select it, then tap the More Options button More Options button.
Tap Split Screen. The clip will appear above the clip at the playhead.
Play the split-screen clip. Position the playhead before the split-screen clip, then tap Play button.
Change the overlay style. Tap the top clip in the timeline, tap Overlay button, then tap Cutaway.
Play the cutaway clip. Position the playhead before the cutaway clip, then tap Play button. The video from the top clip fills the screen while the audio from the bottom clip continues to play.
Show before-and-after images simultaneously to emphasize impact in a process. Add the “after” shot using a horizontal split‑screen effect.
Create a movie quiz where students determine who said a notable quote. Add only the audio from archival videos of persuasive speeches along with the title, “Who said this?”
Use a picture-in-picture overlay to place a small version of one video clip on top of another. You can reposition or resize the smaller frame to create just the look you want.
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