Hey There,
Chat suggested I post in here as they were unable to help… I’m trying to add a back to top button on a Shopify 2.0/Impulse theme site. I read https://help.shopify.com/en/manual/online-store/themes/themes-by-shopify/vintage-themes/customizing-vintage-themes/add-back-to-top but as it is for a vintage theme it won’t work anymore.
Does anyone know how to add a back to top button on Shopify 2.0 please? 
Any help would be massively appreciated.
Thanks so much,
Tasha