Template:Template doc inline/doc
This template displays a "Template documentation" box like you are seeing now.
It is primarily used by Template:Tl to automatically display the documentation for the template from a /doc subpage, but can also be used to display inline documentation.
Usage
Template:Tlx
- Inline documentation is the text to display inside the box.
- Pagename refers to the name of the documentation page, which if specified, creates [view] and [edit] boxes to the right of the heading.