Changing mathjax's font size

Question

I am using mathjax on my page, and i have read that this:

Answer 1

Here are two options to change font size for a specific equation or portion of an equation.

1. Use a .css class.

   \class{className}{}

The className is div class name that can be specified in css.

2. Use Latex

\tiny{ }, \scriptsize{ }, \small{ }, \normal{ }, \large{ }, \Large{ }, \LARGE{ }, \huge{ }, \Huge{ }

If you want to change all equations globally MathJax prints inside of a div. Use css to edit the class font size.

.MathJax {
    font-size: 12pt;
}

Finally if you could also edit the MathJax config to change fonts globally, but I prefer the css version because it allows you change font sizes for different screen sizes.