I love the simplicity of this plugin. Downloaded it to a multisite install, network activated, and wah-la, the page template name appears in the wordpress banner menu. Hovering over the template name displays the relative path of the template.
When I first tested, the template I was using - single.php - was located in the theme folder. Then I moved a copy into the child theme folder, refreshed the page and hocus pocus, the relative path changed to the child folder.
Simple. Helpful. Works. Thanks!