An important part of creating an informative, easily read chart is to describe the contents of the chart. Some chart elements you can add to describe your Excel charts are legends, titles, data labels, and annotations. A legend is an index of categories in a chart and the color used to describe them. A sales chart comparing monthly sales for several years, for example, might display the first year in yellow, the second year in blue, and the third year in red. The legend identifies those relationships so you can read the chart accurately. Titles, data labels, and annotations describe specific parts of a chart or, in the case of annotations, give general information about the data the chart displays.
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