We'll create fresh WordPress site with AMS Page Scroll Back To Top installed. You have 20 minutes to test the plugin after that site we'll be deleted.
AMS Page Scroll Back To Top is a WordPress Plugin which allows to add and customize a button that appears only at specific page height and scroll to the top of the page.
The plugin comes with different options and settings for easy customization of the appearance of the button.
No any kind of HTML or CSS knowledge is required.
To customize the button go to Settings -> AMS Page Scroll Back.