Shape colors vary to call out the different job levels in this chart, and a mixture of branching styles is used for readability (the Manager row is horizontal; the Subordinates are vertical).
Two things that help the scannability of your chart are its layout and design.
Layout refers to how you branch the shapes in the chart—that is, whether you line them up in rows or stack them vertically, or both.
Design refers to the color and styles used for the shapes and connectors. Color serves as a way to distinguish positions or levels in the chart from each other. Style elements like beveling and shadows make the chart look polished and professional (when not overused).
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