As you add more layers to your video or animation, you might want to organize them into a hierarchy. One of the easiest ways is to group the layers. Photoshop preserves the frames in your video or animation in grouped layers.

You can also group a group of layers. Besides nesting your layers in a more complex hierarchy, grouping a group of layers lets you simultaneously animate the opacity of all the grouped layers. The Animation palette displays a group of grouped layers with a common opacity layer property.

For a video on working with video layers, see www.adobe.com/go/vid0027.