fontsizemath-mode
How do I change the font size of something like this: I want to increase the font but it always seems to remain the same.
\documentclass[30pt]{article}
\DeclareMathSizes{20}{20}{20}{20}
\begin{document}
\[
x = \frac{1}{x + \frac{1}{x + \frac{1}{x}}}
\]
\end{document}
Have a look at the relsize package. Package description:
The basic command of the package is
\relsize, whose argument is a number of\magsteps to change size; from this are defined commands\larger,\smaller,\textlarger, etc.
You can update the definition of \ttfamily to include the font changes that you need. For example, below \ttfamily has been updated to always use \LARGE (say). Here is the default definition of \ttfamily from latex.ltx:
\DeclareRobustCommand\ttfamily
{\not@math@alphabet\ttfamily\mathtt
\fontfamily\ttdefault\selectfont}
Here is an updated version in the form of a minimal example:
\documentclass[11pt]{article}
\makeatletter
% Definition of \ttfamily from latex.ltx
\DeclareRobustCommand\ttfamily
{\not@math@alphabet\ttfamily\mathtt
\fontfamily\ttdefault\LARGE\selectfont}
\makeatother
\begin{document}
Some normal text.
{\ttfamily Some typewriter text.\par}
Some normal and \texttt{typewriter} text.
\end{document}
The above example also shows why this should not be done.
Best Answer
The first parameter of
\DeclareMathSizesspecifies the font size to which these settings are applied to. So, for a12ptdocument, if the first parameter is not12, then this command will have no effect. So for the code as below, the output is:but with the line
\DeclareMathSizes{12}{24}{24}{24}un-commented you get:Also see How to make math font huge.