Return to Top Page module allows your site visitor easily to scroll back to top when you have a long scrollable content on your site page. To add this module on your page. Simply install a module called "DNNInfoRTP Return to Top Page".

Once the module installed on your page. You will be able to see the Return to Top Page button located on your right bottom side. 

This is the default. If you want to change the button and it's location. You can easily go to Admin Dashboard page and click the "Return to Top Page" menu.

In the admin screen, you choose the button theme of your preference. You can also set when the button will appear based on the scrolling length. The default value is 250px.