The first image you may see is a thumbnail (or initial image). A single left click will cause a transition to the animation sequence if there is one. If no animation sequence exists, a click with either mouse button on a scrolling or flipping thumbnail will stop it.
If this were a HotMedia, you would click on the initial image to start the animation.
Suppose you also had the following 9 frames:
You could click and drag left and right to sequence between the individual frames in the animation.
To see this thumbnail and animation sequence refer to the Basic Control section of the HotMedia Tutorial .