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Slides

Slide programs can be edited for different groups and presentations, and you can easily back up or advance the slide sequence. Slides are easy to carry and mail, they can be inexpensively reproduced, and the use of color is economical. Slide projectors are standard equipment in many companies, and can be used in rear or front projection systems.

Slides have their disadvantages, though. You must make a new slide when information changes—you can't edit an existing slide as you can with a transparency. To use slides, room lighting must be dimmed, reducing eye contact. You need more lead time to prepare if you are going to use slides: Commercial film development and mounting can take 24 hours to several days, and faster service is expensive. And, remember—long slide presentations can be boring, and they tend to discourage interruption and discussion until the show is over and the lights are on again.


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