How do I log in to the one.com Website Builder?

The fastest way to access the one.com Website Builder is via the direct link http://websitebuilder.one.com/, which takes you to the login page. Alternatively, you can also access your editor through the one.com Control Panel, as described in the following steps.

Log in to the one.com Control Panel. If you're unsure how to do this, you can find help in this guide.
When logged in, click on the Website Builder tile.
You'll now see the Website Builder dashboard. Click the blue button that says Edit site to enter the Website Builder editor.
That's it! Now you can go ahead and work on your website.