title: How do I make the scroll bar on a div more visible?
body: <p>I'm working on a website and have a div filled with photos. You need to scroll down to see all the photos.
  The div is scrollable, but I have been asked to make it more obvious that you can scroll, since people wouldn't immediately think it is scrollable. I have tried searching online but can not find an answer to my question.</p>
  
  <p>Basically how can I make my scroll bar more visible, or how can I make it obvious that you can scroll down to see more? </p>
  
  <p>In case it helps, here's the css for that div</p>
  
  <pre><code>.gallery{
  position: absolute;
  left:40%;
  margin:0 auto;
  width: 600px;
  height: 500px;
  
  overflow: -moz-scrollbars-vertical; 
  overflow-y:scroll;
  
  }
  </code></pre>