Using a Subdomain on Your Custom Domain
The process for connecting a subdomain of your domain is very similar to the process of connecting a domain via www. Instead of having a CNAME for 'www' that points to secure.heightsplatform.com, you would have a CNAME for your subdomain, for example, 'courses', that points to secure.heightsplatform.com
Then when you go to your account settings in Heights Platform you would add your custom domain with a subdomain, ie: courses.mysite.com