Étiquette typographique (anglo-saxonne) // Mind Your En And Em Dashes : Typographic Etiquette - Smashing Magazine
►http://www.smashingmagazine.com/2011/08/15/mind-your-en-and-em-dashes-typographic-etiquette
An understanding of typographic etiquette separates the master designers from the novices. A well-trained designer can tell within moments of viewing a design whether its creator knows how to work with typography. Typographic details aren’t just inside jokes among designers. They have been built up from thousands of years of written language, and applying them holds in place long-established principles that enable typography to communicate with efficiency and beauty.