I discovered something a few days ago that made me ask the question: Am I mad, or are all web designers out of their minds? The sun was shining in my office and I just could not read the information on the web site of a major multinational company.

In my book I spent tens of pages on how to improve the slides of a presentation. I consider the most important guiding principle whether or not people in the audience can actually read the slides. For a number of reasons the legibility is poor in at least 25% of the scientific presentations I have been going to lately. The two most important causes are: (i) too small font sizes and (ii) bad contrast.

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