In the iMovie app on your Mac, select a clip or range in the timeline that you shot against a green or blue backdrop, and drag it above a clip in your project.
When you see the green Add icon (+), release the mouse button.
When you see the green Add icon (+), release the mouse button.
- If the video overlay controls aren’t shown, click the Video Overlay Settings button.
2. Click the pop-up menu on the left and choose Green/Blue Screen.
In the viewer, the clip shot against the green or blue backdrop has the green or blue removed, and the clip below shows through the areas that were green or blue, creating a composite image.
3. The color that iMovie removes is based on the dominant color in the frame at the position of the playhead when you choose Green/Blue Screen from the pop-up menu. If the frame below the playhead isn’t representative of the rest of the clip, you may need to reposition the playhead and reapply the effect.
4. To reposition the green-screen or blue-screen clip, drag it to a different spot within the clip, or to a different clip. You can also drag the ends to lengthen or shorten it.
- To apply the changes, click the Apply button in the Green/Blue Screen controls.
