Avoid having to fumble with electronics to move between slide and overhead to illustrate a last-minute flash of insight. Recognize the limits of the medium. Create slides emphasizing the point being made, rather than providing a comprehensive summary of all data collected. Use a comfortable medium. Computer presentations are slick and flexible but impersonal and run the risk of consuming excessive preparation time.
Slides allow flexibility for well-planned talks.
Overheads offer intimacy and remarkable interactivity. The slide projector in 210 rarely remains in focus. The computer system in 210 projects anything from the monitor, not just Powerpoint, onto the screen.