title: Change font size for individual text section in flexdashboard
body: <p>I'm using flexdashboard to create reports and I want to change a font size only for one part of the page.</p>
  
  <p>It feels to me that I can do it by adding CSS class, but I can't find how can I specify class name in R markdown code.</p>
  
  <p>Any ideas?</p>