i don’t know if there’s an article, but i think it’s pretty easy. login to Backstage, then go to the MultAdmin tab at the top. it will list your MultiSite accounts. click on your main website. when you do that, you’ll be taken to the MultiSite Website Manager, that lists all your current websites/urls. on the left side of the My Sites menu, click on Create Site. then you can fill in the appropriate info (domain, user name, password, email). hope this helps!