Which design practice improves the legibility of charts and graphs in printed materials?

• A. Clear titles
• B. Labeled axes with units
• C. Consistent color coding
• D. All of the above

Answer: (D)

Clear communication in charts comes from making the chart easy to understand at a glance. A clear, descriptive title quickly tells the reader what the chart is about, so they know what to look for without searching. Labeled axes with units specify the scale and what the numbers represent, preventing guesses about magnitude or meaning. Consistent color coding helps readers follow the same categories or data series across multiple charts, reducing confusion and building a steady visual language. In printed materials, these elements work together to convey context, scale, and relationships clearly, even when space is limited or when the viewer reads in grayscale. So using all of these practices together yields the best legibility.