Font sizes in LaTeX

To write text in different sizes in LaTeX, you can use the following standard size-changing commands (from p. 170 in The LaTeX Companion):

• \tiny
  
• \scriptsize
  
• \footnotesize
  
• \small
  
• \normalsize
  
• \large
  
• \Large
  
• \LARGE
  
• \huge
  
• \Huge
  

Source code in LaTeX

If you want to include some source code into a LaTeX-document, you can of course use the verbatim environment. It can be useful to refer to an external file rather than copy & paste the source into the LaTeX-file.

To refer to an external file (which has the advantage that you do not need to apply modifications in two places) can be done by using the moreverb package: insert

\usepackage{moreverb}

at the beginning of your document. I use the following macro

\newcommand{\listscript}[1]{{\footnotesize\verbatiminput{#1}}}

You can now use

\listscript{ex5.m}

in your document if you want to include the source text in the file ex5.m.