To access the ui/Theme-Builder, you can navigate to it in the Admin menu >> Components >> ui/Theme Builder^Pro.

In this interface you can manage your pages:

• New
• Edit
• Publish
• Unpublish
• Check-in
• Delete (Trash)
• Import (only ui/Theme-Builder ^Pro)

Once you have created your page you can create a new menu link to this page:
use the menu item type ui/Theme-Builder >> Page: Display a page created with ui/Theme-Builder Pro.

Load Page Content in Articles

You can also load the content of a page in a Joomla article.
Use the following syntax {loadpageid id} similar to the syntax of loading Joomla modules. The prerequisite is that the Content - Page Builder - ui/Theme-Builder Pro plugin is activated.