Placing a legend near the chart with clear labeling and consistent colors helps viewers match the visual elements to the categories. Summing all data series in a legend can confuse the data story because it reduces clarity on individual contributions. Using an identical color for each category makes it difficult to differentiate the groups. Removing the legend obstructs viewers from knowing what each visual element represents.
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Why is a legend important in a bar chart?
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What are best practices for designing a bar chart with multiple categories?
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Why is using identical colors for all categories in a chart discouraged?