I have been able to add the necessary code to enable a age verification page to my shopify site however I want to add a background to my age verification page. I have looked for help on the shopify assist but I do not understand where I am supposed to locate the page that I have been asked to put the background in. Can anyone please assist me and walk me through how to complete this step.
Currently using Dawn free theme unsure what OS 2.0 is.
