These presentations are widely spread because they are easy to handle. In contrast to ordinary slide shows, computer presentation programs have a greater portfolio of services. The prepared presentations can be stored, changed and reused.
The appearance of the texts and figures on the slide can be timed. The presentations can be printed easily as well. Animated effects, remifications, a quick view of the order of slides are also available functions. Sounds can be rendered to still and motion pictures, too.
Apart from demonstration, an interactive presentation can be useful in individual learning as the student roam freely in the data.