Quick help: Settings -> Setup and scroll down to URL
First you need to point your domain to Confetti through your domain provider. If you are not familiar with setting up domains we recommend you to send this article to you domain provider.
Subdomains (www e.g.) - Most common and recommended!
For subdomains you add a CNAME record from www.yourevent.com (replace with your domain) to cname.confetti.events. Then you navigate to Settings -> Setup, scroll down to URL and add www.yourevent.com to the list of urls. Your new domain should be "primary" and we recommend keeping the .confetti.events one as a redirect just in case.
If you have sent the invites already you have to keep the old one or the link in the invites won't work.
A naked domain is the domain without www or similar in front of it, i.e. yourevent.com. It works a bit different and can't be used with CNAME on all domain providers. Some providers allow you to add a CNAME or ALIAS record for your domain. In that case you point it to cname.confetti.events just as mentioned above, and then add yourevent.com to Confetti. If your provider doesn't allow this handling of naked domains the best solution is to make yourevent.com redirect to a subdomain of your choice, like www.yourevent.com.
One easy way to make yourevent.com redirect to www.yourevent.com is to point an A-record to 188.8.131.52 which will handle this automatically.
Read more here: http://wwwizer.com/naked-domain-redirect
Important: Don't put Confetti in an iframe to handle the support the named domain. This will have unpredictable results. When you click th signup-button the url should change to yourevent.com/signup, if not, you're probably using the iframe "solution".
Setting one of your domains to primary means that yourevent.confetti.events will always redirect the visitor to www.yourdomain.com.