title: What is the difference between absmiddle and middle
body: <p>I'm looking for the difference between the absmiddle and middle when using in the attribute align like this :</p>
  
  <pre><code>&lt;span align='middle'&gt;&lt;/span&gt;
  </code></pre>
  
  <p>or</p>
  
  <pre><code>&lt;span align='absmiddle'&gt;&lt;/span&gt;
  </code></pre>
  
  <p>I don't understand what is the difference and I don't understand which I have to use and when ?</p>