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More Information per Pixel!
In my last post I suggested some chart selection rules as an alternative to Godin’s Silly Rules for Great Graphs. Jerome commented:
[...] on a slide, you want to convey one message. your graph must NOT carry any information that can be interpreted differently than the point you are trying to make. the corollary is that in virtually all cases, you should display as little data points as possible: 1 if possible, 2 but no more than 3. If you need more than 3 data points, use handouts. [...]
which is very much in line with what Seth Godin said in his famous post about Chart Rules:
No, the reason you put a chart in a presentation is to tell a story. A single story, one story per chart
Why should a presentation display as little data as possible? Why should a slide contain only one chart? I demand More Information Per Pixel. Why not have a data-rich chart in a slide - no, even a couple of charts to support my message?