# How can I change the size of one symbol in an equation?


So, is there a way I can go about obtaining the enlarged f in math mode?

You can use something like this:

\newcommand{\bigf}{\text{\Large $f$}}


and then use

\bigf


You can use relsize:

\documentclass{article}
\usepackage{relsize}

\newcommand{\fso}{\mathlarger{\mathlarger{f}}}% f stand out

\begin{document}

Standard $f$ and larger $\mathlarger{f}$,
with even larger $\mathlarger{\mathlarger{f}}$

$\fso(x)\ne f(x)$

\end{document}