title: Adding a javascript script tag some place so that it works for every file in sphinx documentation
body: <p>I am using Sphinx to write some notes. I am using the Mathjax extension for Math in the notes. The default size of the math is little larger than I would like. On the Mathjax page I found that I can change that size by adding the following script to the HTML file.</p>
  
  <pre><code>MathJax.Hub.Config({
    "HTML-CSS": {scale: 90}
  });
  </code></pre>
  
  <p>So, I tried by adding the following in a <code>.rst</code> file:</p>
  
  <pre><code>.. raw:: html
  
      &lt;script type="text/javascript" &gt;
          MathJax.Hub.Config({
              "HTML-CSS": {
                  scale: 90
              }
          });
      &lt;/script&gt;
  
  ==========
  Objective
  ==========
  
  To change math size \\( \\alpha \\).
  </code></pre>
  
  <p>The above works great for the math in that specific <code>.rst</code> file. But I want to do this for many different .rst files that are all part of the same sphinx document. Is it possible to do this without adding the above script to every <code>.rst</code> file? </p>
  
  <p>Thank you for reading this and would appreciate if you can help.</p>