Images

By default, images don't have any borders:

<p>
  <img src="lotus.jpg" />
</p>

But if you want they can be framed (default functionality in the article editor):

<p>
  <img class="fr-bordered" src="lotus.jpg" />
</p>

Or they can have shadow:

<p>
  <img class="image-with-shadow" src="lotus.jpg" />
</p>

Or they can even have overlay:

<p class="image-overlay">
  <img src="lotus.jpg" />
</p>

Border-radius