Separate stronger pre-attentive quantitative encodings from weaker ones.
Sort each visual cue by whether it is usually stronger or weaker for precise quantitative comparison. Stronger for exact comparison Weaker for exact comparison Position on a shared axis Bar length from a common baseline Dot position against a benchmark line Area of circles in a bubble chart Angle of wedges in a pie chart Color saturation used to imply larger values Slope of a line across ordered time 3D depth used to suggest bigger magnitude
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