Optical sizing is the changing of a font’s appearance depending on its size in order to look better or more readable. Even typographists of old understood its importance; Gutenberg-era printing presses featured optical size variations for each letter. Although the process of using optical size-friendly fonts was cumbersome before ー you’d need to use 11 variations of one font ー contemporary advanced variable fonts make it easy, as the browser changes their optical size automatically without any input from you.
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Kai Cheng’s professor had a brilliant scheme. In his first lecture, he promised that each lecture would feature a “Lie of the Day”. But why? It made his students more attentive and analytical, poring over every detail of his lecture and making sense of why things were true. It was such a powerful teaching method that his students digested his most technical lectures quite easily because they tried so hard to catch his lie. The kicker? There was no lie in that first lecture; he had lied about that too! Read full article here