The following article explains how it is possible for the owner of a distribution web site to add a new template to the frontend gallery.
The default template is the starting point of any project. It can only be edited by administrators and moderators of the platform and it is composed of multiple parts:
x5 main template fields
HTML
CSS
Javascript
Static Content
Custom Elements
x3 libraries of importable resources
CSS Library
JS Library
Element Library
x4 gallery settings
Template Type
Template Range
Editor Implementation
Feature