title: Activate the scroll in the code position: fixed; in css
body: <p>I have a page where I've fixed the menu on the right. I want this section to be scrolled when it's full. I've tried this and it's impossible for me, so I need your help.<br>
  Note: from the overflow-y:scroll; I used it but did not have any results.<br>
  Is there a solution to this problem that I can apply to the fixed section and see the rest?</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.cbp-spmenu {
    background: #47a3da;
    position: fixed;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;nav class="cbp-spmenu" id="cbp-spmenu-s2"&gt;
    &lt;h3&gt;Menu&lt;/h3&gt;
    &lt;ul&gt;
      &lt;li&gt;&lt;a href="#home" class="scroll"&gt;Home&lt;/a&gt;&lt;/li&gt;
      &lt;li&gt;&lt;a href="#home" class="scroll"&gt;Home&lt;/a&gt;&lt;/li&gt;
    &lt;/ul&gt;
  &lt;/nav&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p><a href="https://i.stack.imgur.com/XUmFn.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XUmFn.png" alt="screenshot of the problem"></a></p>