title: Django - adding extra html in admin
body: <p>I have a model class like this</p>
  
  <p><em>models.py</em></p>
  
  <pre><code>class Places(models.Model):
      name = models.CharField(max_length=50)   
      address = models.CharField(max_length=50)  
      tel = models.CharField(max_length=50)
  </code></pre>
  
  <p>I want to put a google map under the address field and have a custom button next to the address field. The button is used to pin point the location when user click on it, based on the address input.  </p>
  
  <p>So, my question is how do I insert the button next to the address fields and html tags under it for map rendering? </p>
  
  <p>Thanks.</p>