title: Add a scrollbar in a huge dropdown menu
body: <p>I am currently working in my website and I am having issues with my responsive design menu. The problem is this menu includes a lot of stuff and when you open it the content disappears from the screen area and there is no way to see the whole list. How can I add an scroll bar in that menu? Or at least, can I add some up and down arrows?</p>
  
  <p>Thank you so much for your help!</p>