title: How to change the font in Markdown cells when they are in Edit Mode?
body: <p>I want to change the font type in Markdown cells when I am editing them. 
  How Can I do that?</p>
  
  <p>I can edit the file <code>.jupyter/custom/custom.css</code> and change the font when they are "run":</p>
  
  <pre><code>div.text_cell_render {
      font-family: 'Linux Libertine O';
      font-size: 12pt;
  }
  </code></pre>
  
  <p>As shown in the figure, the upper half is a Markdown cell in edit mode, and that is the place where I want to change the font.
  <a href="https://i.stack.imgur.com/ht3Hr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ht3Hr.png" alt="example"></a></p>