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— section: Adjusting the typesetting subsection: Alternative document classes permalink: /FAQ-extsizes date: 2014-06-10 —

# Other document font sizes?

The LaTeX standard classes have a concept of a (base) document font size; this size is the basis on which other font sizes (those from `\tiny` to `\Huge`) are determined. The classes are designed on the assumption that they won't be used with sizes other than the set that LaTeX offers by default (10–12pt), but people regularly find they need other sizes. The proper response to such a requirement is to produce a new design for the document, but many people don't fancy doing that.

A simple solution is to use the [`extsizes`](https://ctan.org/pkg/extsizes) bundle. This bundle offers extended versions of the article, report, book and letter classes, at sizes of 8, 9, 14, 17 and 20pt as well as the standard 10–12pt. Since little has been done to these classes other than to adjust font sizes and things directly related to them, they may not be optimal — but they are at least practical.

More satisfactory are the _KOMA-script_ classes, which are designed to work properly with the class option files that come with [`extsizes`](https://ctan.org/pkg/extsizes), and the [`memoir`](https://ctan.org/pkg/memoir) class that has its own options for document font sizes 9pt–12pt, 14pt, 17pt, 20pt, 25pt, 30pt, 36pt, 48pt and 60pt. The classes also offer size setup for any old font size, and the [`scrextend`](https://ctan.org/pkg/scrextend) package can extend this facility for use with any class: ```latex \usepackage[fontsize=12.3]{scrextend} ``` will indeed set up the main document font to have size `12.3pt` with an appropriate default baselineskip. The package knows about _KOMA-script_'s default sizes, and for eccentric sizes such as the example, it will produce a warning: ```latex Using fallback calculation to setup font sizes ``` (users should avoid becoming excited about that…). The package suffers from the same problem as does [`extsizes`](https://ctan.org/pkg/extsizes): the resulting font sizes are the _only_ feature of the document that is changed, and the appearance of the resulting document will probably not be as good as if the document class had been designed for use at the size chosen.

Many classes, designed to produce typeset results other than on ordinary paper, will have their own font size mechanisms and ranges of sizes. This is true, for example, of [poster classes](FAQ-poster.md) (such as [`a0poster`](https://ctan.org/pkg/a0poster)), and of [presentation and lecturing classes](FAQ-slidecls.md) (such as [`beamer`](https://ctan.org/pkg/beamer).

3_composition/texte/symboles/polices/comment_avoir_d_autres_tailles_de_police.1527238565.txt.gz · Dernière modification: 2018/05/25 08:56 de joseph.wright
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