title: rmarkdown beamer reduce font size for references
body: <p>How can I reduce the font size in the references section of an beamer presentation written in rmarkdown?
  I was able to get the references on multiple slides, but they are so many, I would like to also reduce the font size.</p>
  <pre><code>---
  title: &quot;minimal reproducible example&quot;
  author: &quot;User&quot;
  date: &quot;April 2022&quot;
  output: beamer_presentation
  bibliography: references.json
  ---
  
  ## Main question
  
  
  
  How can I reduce the font size in the references section of an beamer
  presentation written in rmarkdown (@xie_etal20, @rcoreteamLanguageEnvironmentStatistical2021)?
  
  I was able to get the references on multiple slides, but they are so
  many, I would like to also reduce the font
  size.
  
  
  ## References {.allowframebreaks}
  
  </code></pre>