Template:Uses TemplateStyles/doc

Preview:

This template is used to show that templates have been converted to use TemplateStyles. It is placed at the top of the template's /doc page. It automatically adds the template to Category:Templates using TemplateStyles, or to one of its subcategories.

The syntax for actually doing a TemplateStyles is, of course: <templatestyles src="" /> (with the page name in the quotation marks).