There are many reasons for the popularity of electronic presentations and digital media:
They’re relatively easy to create, save, and revise, making it possible to reuse resources effectively and efficiently.
They can be projected to large audiences and transported easily on a laptop (and also on a DVD player, as we’ll see in Chapter 7, “The Latest Technologies: Beyond PowerPoint to the Future”).
They can incorporate motion, which was missing in 35mm slides.
In many ways, the ability to introduce motion is the feature that has truly enabled electronic presentations to take advantage of the metaphor of stage and film production. Elements can be introduced as they are needed in groups or as individual components. ...