Plesk Sitebuilder is shipped with a number of built-in site development presets (templates intended to facilitate the site creation process in Plesk Sitebuilder Wizard) and modules (components which extend the site functionality: Blog, Guestbook, eShop, etc.).
The set of site development templates and modules you have at your disposal is regulated by your service plan. Which templates and modules will be available to your dependent users you define in their service plans. Creating or integrating custom modules is not supported.
There are three types of site development templates:
On each respective step, your users can choose any other design template or page set instead of the ones provided by a chosen site family.