About Nested Templates
A nested template is a template whose design and editable regions are based on another template. Nested templates are useful for controlling content in pages of a site that share many design elements, but have a few variations between pages. For example, a base template might contain broader design areas and be usable by many content contributors for a site, while a nested template might further define the editable regions in pages for a specific section in a site.
Editable regions in a base template are passed through to the nested template, and remain editable in pages created from a nested template unless new template regions are inserted in these regions.
Changes to a base template are automatically updated in templates based on the base template, and in all template-based documents that are based on the main and nested templates.
In the following example, the template trioHome contains three editable regions, named Body, NavBar, and Footer:
To create a nested template, a new document based on the template was created and then saved as a template and named TrioNested. In the nested template, two editable regions have been added in the editable region named Body.
When you add a new editable region in an editable region passed through to the nested template, the highlighting color of the editable region changes to orange. Content you add outside the editable region, such as the graphic in the editableColumn, is no longer editable in documents based on the nested template. The blue highlighted editable areas, whether added in the nested template or passed through from the base template, remain editable in documents that are based on the nested template. Template regions that do not contain an editable region pass through to template‑based documents as editable regions.