Partial (CNAME) setup

What is the name of the domain?

bittap.com

What is the issue you’re encountering

I did not find any settings related to Partial (CNAME) setup.

What feature, service or problem is this related to?

I don’t know

What are the steps to reproduce the issue?

The above is your document, but I can’t find the relevant button on the page. How can I set it?

I have upgraded to business plan, but I don’t see the button under Advanced Actions.