How to add a back to the top button?

If you have a long page, it will be a good idea to have a back to the top button that will bring your customer to the top of the page.With Visual Composer, you can do that by giving an element id on your first row. And then you can create a button or icon and link it to that element id. It's the same method as How to link to a section on the same page.After that, you can set your button or icon to be sticky all the time. So it will always stick when user scrolling.