How can I add a "Scroll to top" button? in Coding and Customization Posted September 2, 2014 · Edited September 2, 2014 by victorstan You can host any additional files right inside the Custom CSS Editor Window. At the bottom right corner you will see two buttons, one of them says Custom Files (the one left to the Save button). Pressing it will open a side drawer and you simply drag and drop your files there. To link the files place your typing cursor where you want to the link to be inserted and just click on the file you uploaded. The url is automatically inserted. Hope this helps and let me know if you need more help!