title: Selenium: Scrolling a scroll bar within browser window (not the browser scroll bar)
body: <p>I am trying to scroll within the browser window. Normally you would scroll the browser's scroll bar through:</p>
  
  <pre><code>browser.execute_script('window.scrollTo(0, document.body.scrollHeight)')
  </code></pre>
  
  <p>But this is not what I am trying to do. In the image below you'll see the scroll bar that I am trying to scroll down through. </p>
  
  <p>See red arrow for the scroll bar where I want to scroll:
  <img src="https://i.stack.imgur.com/xBgrw.jpg" alt="screenshot"></p>