Module 25 is titled “Using Visuals.” The module advises that using charts and graphs help make numbers meaningful and thus help communicate your points in oral presentations, memos, letters, reports, and meetings. It is recommended that visuals be used in both the rough draft and final presentation or document. Use visuals to make your points more vivid. Readers skim memos and reports, but a visual catches their eye. Visuals help to emphasize information that might be skipped if it is buried in a paragraph. They also present information more compactly and with less repetition than words alone. It also will focus the information that decision makers need. The number of visuals that you need to use will depend on your purpose, the kind of information being presented, and your audience. When using a chart, check to make sure the data is reliable. The chart is only as good as the data it contains. Every visual should tell a story. Focus on the topic and simplify the data. The relationships and changes should be described in a sentence, and the sentence can also serve as the title of the visual. Visuals are not interchangeable so choose the visual that best matches the purpose of presenting the data. Use tables when the reader needs to be able to identify exact values. To compare a part to a whole, use a pie chart. In order to compare one item to another or items over time, use a bar chart or a line graph. Be careful when using colors in your visuals. Your readers might try to interpret the colors, or different meanings might be assigned to the colors based on your audience’s national background and profession. Connotations for colors vary from culture to culture. In memos and reports, resist the temptation to make your visual “artistic”. Always double check your visuals to be sure that the information is accurate. For presentations, simplify your paper visuals. To simplify a complex table, divide it into several visuals. You can even cut out some of the information, round off the data, or present the information in a chart. Visuals used for presentations should have a title.
One section in Module 25 is “What design conventions should I follow?” This section advises that every visual should have six components. A visual should have a title that tells a story that the visual shows. It should also have a clear indication of what the data are. The visual should contain clearly labeled units. It should also contain labels or legends, identifying axes, colors, and symbols. Everything the visual contains should be easily identified. The source of the data should also be included, along with the source of the visual. Use tables only when you want the audience to focus on specific numbers. Pie charts force the audience to measure area. Bar charts are easy for your audience to interpret, because they ask people to compare distance along a common scale. Grouped bar graphs allow you to compare several aspects of each item or several items over time. Segmented, subdivided, or stacked bars sum the components of an item. Deviation bar charts identify positive and negative values or winners and losers. Paired bar charts show the correlation between two items. Histograms and pictograms use images to create the bars. Line graphs are also easy to interpret. Use line graphs to compare items over time, to show frequency or distribution, and to show correlations.