ViewgraphsIntroductionViewgraphs are the most common and versatile media for visualpresentations. They offer spontaneity and interaction. Once the media ofchoice, they lost popularity to the 35mm slide. However, computer-generated graphics and color printers have bolstered their popularity.Sometimes, the viewgraph is the appropriate media to recommend for apresentation.AdvantagesThere are many advantages of viewgraph presentations. Viewgraphs are easyto change, right up to the last minute. They are large in format, allowing foreasy preview. Their size approximates a notebook or binder. The projectiondevice is easy to work and overhead projectors are commonplace. You canmake paper copies from the same artwork used for the viewgraph todistribute to the audience and increase audience participation. Viewgraphs donot require a totally darkened room to project. Providing you use the righttype of marker, you can reuse viewgraphs that have blanks to fill in fromclass to class.DisadvantagesThere are few disadvantages of viewgraphs. Primarily, viewgraphpresentations require someone to switch viewgraphs as the presentationprogresses. If left to an inexperienced person, the presentation may lookamateurish or slipshod.FormatThe standard aperture area of a viewgraph is 7 1/2 by 9-inch. Using ahorizontal format maximizes presentation area by filling the viewing screen.Mixing horizontal and vertical formats in the same presentation may provedistracting and vertically oriented viewgraphs can bleed on to the floor orceiling.ArtworkKeep images simple. Limit concepts presented by projecturals to a singletopic. Break complicated visuals into a series of simple images forpresentation. Use color purposefully to emphasize or clarify detail. Keepreduction in mind. Often, artwork created for a viewgraph will wind up as aslide.Continued on next page2-35
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