This plugin is an incredibly useful part of my development toolkit. A hugely useful addition, however, would be if it also outlined calls to get_template_part so I could easily determine all of the PHP files that were being used to display the content on the page. This could either be as part of the existing "What the File" drop down or could be outlined on the page itself. Of course I have no idea if this is actually possible with WordPress' current set of hooks but still, food for thought! Keep up the good work!