The process to publish a subpage is uniform across all subpages. Follow the same steps inside any subpage editor to publish that page.
1Log in to your SubPage account and open the page dashboard. Click 'Connect Domain' at the top right.
2In the sidebar that appears, click the 'Publish Type' dropdown and select 'SubPage Domain.'
3Enter your desired subdomain name and click 'Save and Publish.' Your page will be published under SubPage Domain.