Editing Template:Documentation/doc (section)

=== Automatic functions ===
If the documentation page does not exist, the [create] link includes a [[mw:Manual:Creating pages with preloaded text|preload]] page so that clicking it will pre-fill the edit form with the basic documentation page format. Preload text is also used for the /sandbox and /testcases <small>(create)</small> links.

When this template is on a protected template page it now automatically adds the grey or red padlock in the top right corner. So no need for a separate template to do that.

When this template is on a /sandbox subpage it automatically adds the {{tl|Template sandbox notice}}.