I have just tried to tie up the domain I ordered here to a site outside of here. How to move it back to the free site now? I don't know how to set up. Thanks.
Thank you for your patience. Are you referring to our free website builder service? If so, you would just need to follow the steps in this guide to re-link your domain name to the website builder:
How do I connect my domain with my Website Builder? https://www.dynadot.com/community/help/question/connect-domain-to-website-builder