title: centering titles when using the beamer class in latex
body: <p>I want to center the frametitles on my talk.  I understand that the beamer class has a built-in ability to center frametitles, but I can't figure out how to do it.  It is something like:</p>
  
  <pre><code>\begin{frame}
  \frametitle[alignment=center]{title}
  \end{frame}
  </code></pre>
  
  <p>but that doesn't work.</p>
  
  <p>Can I get a little help?</p>