Exchange media in a project in Motion
You can overwrite an image layer with media from a different file. This process, called exchanging media, replaces the layer’s original source media link with a new source media link. When you exchange a layer’s source media, the layer retains its Property Inspector parameter values (including Position, Scale, and Opacity, and Blend Mode), as well as applied filters, behaviors, masks, or keyframes.
The exchange operation lets you replace layers in your project even after you’ve modified and animated them. If you’re unhappy with an element of your composition, exchange it with a new one.
Important: You can only exchange layers that are linked to source media files on your computer or networked device. You cannot exchange Motion-generated objects such as particle systems, generators, shapes, or text objects. You can only exchange 3D object files with other 3D object files.
Download this guide: PDF