THESE THREE HORIZONTAL MARKS are often misunderstood and confused. The hyphen connects linked words and phrases and also may be found when a word breaks from one line to the next. An en dash (slightly longer than a hyphen but shorter than an em dash) is used to connect a range of numbers (i.e., 20–30). An em dash, the longest of these horizontal marks, is used to set off a separate thought or grammatical break within the text, and it is often used in tandem with another em dash at the end of the break. This is a generally recognized standard; however, Robert Bringhurst advises a more refined version of these rules: using spaced en dashes rather than em dashes (reserving em dashes to introduce speakers in a narrative dialogue) and using close-set en dashes to connect a range of numbers.
Art Director
Arem Duplessis
Art Director, Designer
Gail Bichler
Client
The New York Times Magazine
The em dashes set off a separate thought; they look best with a generous space on either side.
Project
Stats spread
Redesign Art Director
Francesca Messina
Co-Designer
Amy Rosenfeld
Client
Businessworld
Number ranges show the proper use of en dashes, and word breaks show the proper use of hyphens. Em dashes are used to indicate a lack of data in the chart.
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