Font substitution is the process of using one font in place of another when the intended font either is not available or does not contain glyphs for the required characters. In typography, a typeface is a co-ordinated set of character designs, which usually comprises an alphabet of letters, a set of numerals and a set of punctuation marks. ... These are the astrological glyphs as most commonly used in Western Astrology A glyph is a specific symbol representing a semantic or phonetic unit of definitive value in a writing system. ...

Font substitution is aided by classifying fonts into families, such that for example a sans serif font is substituted by another sans serif font. In typography, a typeface is a co-ordinated set of character designs, which usually comprises an alphabet of letters, a set of numerals and a set of punctuation marks. ... This article or section does not cite its references or sources. ...

When font substitution is being used to find a replacement for an unavailable character, it can lead to inconsistent visual appearance as part of a word or sentence is displayed in one font and another part is displayed in the substituted font. A method to work around this problem is to display the entire word or paragraph in the substituted font.

Examples of systems that perform font substitution include fontconfig, Adobe Reader, Unidrv, and Microsoft Word (since Word 2002). Not all systems that claim to offer font substitution are able to substitute for missing characters; some are only capable of substituting for missing fonts. fontconfig is a library designed to provide system-wide font configuration, customization and application access. ... Adobe Acrobat Reader running on Debian Adobe Acrobat was the first software to support Adobe Systems Portable Document Format. ... Microsoft Word, or Microsoft Office Word, is Microsofts flagship word processing software. ...

External links

• Description of font substitution in fontconfig

This typography-related article is a stub. You can help Wikipedia by expanding it.