## Class files

L a T e X normally chooses the appropriate font and font size based on the logical structure of the document (e.g. sections). In some cases, you may want to set fonts and sizes by hand.

# Introduction

The syntax to set a font size or font style is easy:

This is a simple example, \tiny{this will show
different font sizes} and also \textsc{different
font styles}.

This example shows how to use the smallest available font ( tiny ) in L a T e X and the small caps style.

# Font sizes

Font sizes are identified by special names, the actual size is not absolute but relative to the font size declared in the  \documentclass  statement (see Creating a document in LaTeX ).

In this example the {\huge huge font size} is set and
the {\footnotesize Foot note size also}. There's a fairly
large set of font sizes.

In the example,  {\huge huge font size}  declares that the text inside the braces must be formatted in a huge font size. For a complete list of available font sizes see the reference guide .

# Font families

By default, in standard L a T e X classes the serif typeface (a.k.a. roman) font is used. The other font typefaces (sans serif and typewriter, a.k.a. monospace) can be used by entering some specific commands

In this example command and switches are used.
\texttt{A command is used to change the style
of a sentence}

\sffamily
A switch changes the style from this point to
the end of the document unless other switch is used

You can set up the use of sans font as a default in L a T e X document by using the command:

 \renewcommand{\familydefault}{\sfdefault}

Similarly, for using roman font as a default:

 \renewcommand{\familydefault}{\rmdefault}

# Font styles

The most common font styles in L a T e X are bold, italics and underlined , but there are a few more.

Part of this text is written \textsl{in different
font style} to highlight it.

In the example at the introduction the small caps style was used. In this case the  \textsl  command sets the slanted style which makes the text look a bit like italics but not quite. See the reference guide for a complete list of font styles.

If you want to go back to "normal" font style (default for the L a T e X class you are using), this can be done by using the  \textnormal{...}  command or the  \normalfont  switch command.

# Reference guide

Font sizes

Command Output
\tiny
\scriptsize
\footnotesize
\small
\normalsize
\large
\Large
\LARGE
\huge
\Huge

Default font families

typeface = family command switch command output
serif (roman)  \textrm{Sample Text 0123}   \rmfamily 
sans serif  \textsf{Sample Text 0123}   \sffamily 
typewriter (monospace)  \texttt{Sample Text 0123}   \ttfamily 

Font styles

style command switch command output
medium  \textmd{Sample Text 0123}   \mdseries 
bold  \textbf{Sample Text 0123}   \bfseries 
upright  \textup{Sample Text 0123}   \upshape 
italic  \textit{Sample Text 0123}   \itshape 
slanted  \textsl{Sample Text 0123}   \slshape 
small caps  \textsc{Sample Text 0123}   \scshape