Uniwidth typeface

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Not to be confused with unicase fonts.
Example of a uniwidth typeface. Neither font weight nor font style affects the alignment of the two lines.

A uniwidth typeface, also known as an equal-width, duplexed, or multiplexed typeface, is a typeface where every variation (font) has the same metrics (size of each letter). As a result, changing the variation used, such as using bold or italics, does not change the layout (reflow).[1][2]

The idea of a uniwidth typeface dates back to the days of hot metal typesetting, when the duplex matrices on Linotype machines allowed for two font styles to be used, but required them to be of the same width.[3] A common combination was regular and italic for printing body text, or regular and bold, but Linotype also offered more unusual combinations, such as a serif text face duplexed with a bold sans-serif for emphasis.[4] Modern computer uniwidth typefaces are useful on tightly designed user interfaces (UIs). A variable font that is uniwidth provides even more versatility.[1]

In a UI context, the term "uniwidth typefaces" refer to proportional typefaces only, as fixed-width typefaces trivially satisfy the definition. Tabular figures are excluded not only for this reason, but also because they only cover a small part of the font.[1] Monospaced fonts are inherently duplexed.[5]

In TeX, the uniwidth version of a boldface is invoked by \fontseries{b} ("bold"), which is different from the usual "extended bold face" (bx).[6]

Prominent font designer Lucas de Groot has written "I am opposed to the uniwidth concept, because letter shapes suffer by definition."[7]

References

  1. ^ a b c Staudinger, Lisa (31 January 2021). "Uniwidth typefaces for interface design". UXDesign (Medium).
  2. ^ Sudweeks, David. "Uniwidth Typefaces". FontShop.
  3. ^ Durbeck, Robert (2012). Output Hardcopy Devices. Elsevier. p. 502. ISBN 978-0-323-14674-6. the fitting of letter shapes to certain available widths, "duplexing", or the placing of a light and bold character on the same width
  4. ^ Handbuch der Schriftarten. Leipzig: Seemann. 1926. p. 293. Retrieved 30 June 2017.
  5. ^ Hoefler, Jonathan. "Operator, a new typeface". Vimeo. Hoefler & Co. Retrieved 20 August 2022. Letters typically get wider as they get bolder, but typewriter faces are bound by a fixed width, and can't get very bold.
  6. ^ Gregorio, Enrico. "horizontal alignment - Make numbers in table bold w/o changing width". TeX - LaTeX Stack Exchange.
  7. ^ @fontfabrik (January 29, 2021). "No, TheSans TheSerif TheMix are not uniwidth. I am opposed to the uniwidth concept, because letter shapes suffer by definition" (Tweet) – via Twitter.
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