DESPITE MANY YEARS OF ADVANCES in computer graphics hardware and software, and in human interface technologies' designs, and styles, our user interfaces are still primarily static' The purpose of this chapter is to review ways in which dynamic imagery and animation have been used in interfaces to date, and to sketch some ways in which they could be used to enrich the interfaces of the future. Our thesis is that current uses of animation at the interface have barely scratched the surface of what is possible and interesting.