We should provide users of a "Master" to create Templates. Its a layout made by fragments usually placed on header/footer with an empty space to configure templates.
The user should be able to edit/change this master from "templates" or from "master templates" list
To create Templates: A template is always made by a master (a master could have fragments...or blank)
Master Templates can be edited
Master Templates can be changed from templates
-Go to Navigation > Site Pages > Master Template
-Create Master with fragments
-We can add fragments to different places "header" and "footer" to configure this master