Without Login (before login)
You can display any page (i.e., About Us,) to the portal users even before the login is public.
For that, you need to select the options “Public” and the “At Top” in Page Nesting at the time of creating the Page Builder of any Object/page.
If you have enabled any page by selecting the Form that needs to appear without Login (Before Login page), it will appear before the log-in page. So the users who are not registered yet can also connect with the organization by sharing details as per the Form.