title: Changing math formulas font size in RPres
body: <p>How can I change the font size of the the math formulas in Rpres? [Editor's note: 'Rpres' is the file extension used by RStudio for its "Presentation" files. It's apparently been adopted by users as shorthand for that section of the IDE.]  A similar problem is faced in <a href="https://stackoverflow.com/questions/25612385/code-box-size-and-font-size-in-rpres">Code box size and font size in RPres</a>, but it does not solve the problem with math formulas, that are not part of a chunck of code separated from the text, but are a chunk of LaTeX code.</p>
  
  <p>Please consider, for example, this section of a slide produced with the default setup:</p>
  
  <pre><code>The average height is 175cm, with a standard deviation of 10. 
  The z-score for a student 163cm is given by the formula:
  
  $$z = (x - \mu)/\sigma$$
  
  where $x$ is the student of our interest, $\mu$ is the distribution mean of
  the school and $\sigma$.
  </code></pre>
  
  <p>Returns: </p>
  
  <p><a href="https://i.stack.imgur.com/DsKWr.png" rel="noreferrer"><img src="https://i.stack.imgur.com/DsKWr.png" alt="enter image description here"></a></p>
  
  <p>Sure enough, the approach suggested in <a href="https://stackoverflow.com/questions/25612385/code-box-size-and-font-size-in-rpres">Code box size and font size in RPres</a> does not affect the size of the math formulas.</p>