We'll create fresh WordPress site with Plugin Name: GMO Go to Top installed. You have 20 minutes to test the plugin after that site we'll be deleted.
This plugin let you place a link button to go back to top of the page from the bottom of the screen. You can place a button either bottom left or right of the screen.
Even if you are at the bottom of the long single page, this button will take you all the way back to the top with a single click.
You can also change button color, size, position and styles or you can even use your own button to perfectly suit your website design.