Understanding How Timelines Work

All objects that are included in a timeline animation are contained in layers. The layers are arranged in a timeline, which generates a path of movement and controls timing. A timeline consists of a series of frames, much like frames in a movie. Each frame displays on the Web page at a specific point in time, depending on how many frames per second you specify and how long the animation is. You can control the placement and properties of each layer in a frame. A frame can also trigger a behavior during the animation.

To move an object (such as text or a graphic), the object must be contained in a layer. Objects such as images can be added to the timeline without placing them in a layer, but you will not be able to animate their positions.