![]() To make the background longer or shorter to match your green screen footage, drag the edge of the background.Select the green screen footage you want to use and drag and drop it above the background.If the image has a zoom or other similar effect, click on the Adjust button, and select the Fit button if the image is already in the right aspect ratio, or Crop to Fill to resize it to fill the background, unless you prefer to use the default Ken Burn effect.Drag and drop the background video or image into the timeline.To use green screen in iMovie, first you need to start with an empty project and select the background you would like to use.Chroma Keying in Final Cut Pro X, however, is much more powerful and allows advanced chroma key adjustments. ![]() iMovie green screen effect is simple to use, but very limited in term of doing further adjustments. If you have a clean key and want to simply replace the green screen with your desired background image or a video clip, you may use iMovie green screen effect. How to use Chroma Keying effects? Both iMovie and Final Cut Pro X provide Chroma Key effect. Refer to the following image for suggested subject position and lighting set-up. Alternately, if your screen is slightly out of focus, it often can smooth unnoticed unevenly lit spots, making for an easier key. Sharp focus on your subject is important to successful chroma key work.Position your camcorder far enough from the subject to attain the desired view.Try not to cause hot spots on your subject. ![]()
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