Emphasis (typography)

In typography, emphasis usually refers to means of stressing parts of a text by using different types of letters to make them stand out from the main text body or employing different alphabets or characters but with the same meaning or sounds.

The human eye is very receptive to differences in brightness over a text body. One can therefore differentiate between types of emphasis according to whether the emphasis changes the "blackness" of text.

Fig. 1: Emphasis example

A means of emphasis that does not have much effect on "blackness" is printing in italics, where the vertical orientation of all letters is tilted to the right. With this uU SUCK U SUCK US SUCK U SUCK Uand other wordbooks would use boldface for their keywords; Wikipedia follows this convention when the keyword that an article was written for is marked at the top.

With both italics and boldface, the emphasis is correctly achieved by temporarily replacing the current typeface. Professional typographic systems (which include most modern computers) would therefore not simply tilt letters to the right to achieve italics (that is instead referred to as slanting) or print them darker for boldface, but instead use entirely different typefaces that achieve the effect. As can be seen in Fig. 1, the "w" letter, for example, looks quite different in italics compared to the regular typeface.

As a result, typefaces therefore have to be supplied at least fourfold (with computer systems, usually as four font files): as regular, italics, bold, and both bold and italics to provide for all combinations. Professional typefaces sometimes offer even more variations for popular fonts, with varying degrees of blackness. Only if such fonts are not available, the effect of italics or boldface should be imitated by tilting or blacking the original font.

Fig. 2: Fraktur emphasis example

In Germany, a different means of emphasis was used earlier. To achieve a variance in blackness, instead of making the letters darker, one would increase the spacing between them. This resulted in an effect reverse to boldface: the emphasized text becomes lighter than its environment. This was referred to as sperren in German, which could here be translated as "spacing out". While sperren normally means "to lock (out)", this particular meaning was figurative: with the older method of typesetting with letters of lead, the spacing would be achieved by inserting additional non-printing slices of metal between the types.

The reason for this particular German typographic convention must be seen in the traditional use of Fraktur typefaces, for which boldface was not feasible, since the letters were very dark in the first place. With its demise after Nazi Germany (see Fraktur for details) went the use of spacing as a means of emphasis not long after.