title: Wordpress change functionality of TinyMCE button U (underline)
body: <p>does anybody know how to change functionality of button in wordpress content textarea? There is a "u" button (underline) which makes text </p>
  
  <p><code>&lt;span style="text-decoration-line: underline;"&gt;text underlined&lt;/span&gt;</code></p>
  
  <p>what I need is change functionality of this button to put in content: </p>
  
  <pre><code>&lt;u&gt;text underlined&lt;/u&gt;
  </code></pre>
  
  <p>Can someone help?</p>