They use visual cues such as size of the circle (cases are bubbles in the new paradigm), the colour and the proximity and number of connections to other bubbles. (canadianlawyermag.com)
Sizes of circles represent the number of interactions per resource, and connection line widths show the overlap of interactions between them, measured by Simpson index (Equation S3). (sciencedaily.com)
Varying sizes of circles lend a playful vibe to this stylish Mason fashion. (momandbabylab.com)