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How to Create semi-transparent overlays in iMovie in Mac OS X

Learn how to use Seashore to create a 32-bit semi-transparent image and then use that image as an overlay to point out or highlight something in your iMovie video. It's easy! So easy, in fact, that this home-computing how-to from MacMost can present a full overview of the process in about 4 minutes. For more information, including detailed, step-by-step instructions, watch this Apple lover's guide.

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.

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