[Tex/LaTex] How to change the font size in math equations

equationsfontsizemath-mode

I find that whenever I'm typing some equations into a document, and the equation gets a bit complex (let's say a fraction in a parentheses, squared, inside a square root, inside a fraction), the variables and whatnot that I put inside the "inner" parts of the equation get really, really, tiny. But if I set the font size to something a lot larger, the stuff on the "inside" gets tolerable, but the stuff on the "outside" (e.g., "x = lots of junk", x would be in the "outside") become gigantic!

How can I make it more pretty like my textbooks, where all variables are at the same size regardless of whatever parentheses/fractions/radicals they're under?

Best Answer

To get equal sizes, you could use \DeclareMathSizes in your preamble. The syntax is

\DeclareMathSizes{display size}{text size}{script size}{scriptscript size}.

You could simply set all to your default font size. In this example:

\documentclass[10pt]{article}
\begin{document}
\[
  x = \frac{1}{x + \frac{1}{x + \frac{1}{x}}}
\]
\end{document}

where you firstly get different sizes:

alt text

inserting this line

\DeclareMathSizes{10}{10}{10}{10}

changes the output to:

alt text

Related Solutions

[Tex/LaTex] Equations, change the font size

The first parameter of \DeclareMathSizes specifies the font size to which these settings are applied to. So, for a 12pt document, if the first parameter is not 12, then this command will have no effect. So for the code as below, the output is:

enter image description here

but with the line \DeclareMathSizes{12}{24}{24}{24} un-commented you get:

enter image description here

Also see How to make math font huge.

\documentclass[12pt,border=5pt]{standalone}
% \DeclareMathSizes{12}{24}{24}{24}% Uncomment to see the effect
\begin{document}
\[
   x = \frac{1}{x + \frac{1}{x + \frac{1}{x}}}
\]
\end{document}

[Tex/LaTex] How change math font size in power

I show your original, followed by two alternatives. The first scales the summation to 20% of the original size. The second scales the 3 to 500% of the original size. The \scaleobj command is part of the scalerel package. It is similar to the \scalebox command of the graphicx package, except that it defaults to math mode, and takes the current math style into account.

\pdfoutput=0
\documentclass[fleqn]{article}
\usepackage[T2A]{fontenc}
\usepackage[cp1251]{inputenc}
\usepackage{concmath}
\usepackage{amsmath}
\usepackage{scalerel}

\begin{document}
\thispagestyle{empty}

\begin{displaymath}
3^{\displaystyle \sum_{n=0}^{\infty}\frac{(-1)^n}{2^n}}
\end{displaymath}

\begin{displaymath}
3^{\scaleobj{.2}{\displaystyle \sum_{n=0}^{\infty}\frac{(-1)^n}{2^n}}}
\end{displaymath}

\begin{displaymath}
\scaleobj{5}{3}^{\displaystyle \sum_{n=0}^{\infty}\frac{(-1)^n}{2^n}}
\end{displaymath}

\end{document}

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Equations, change the font size

[Tex/LaTex] How change math font size in power

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