Show which php template WordPress is using, shows in the footer

which_wp_template.php

<?php

// add to functions.php
// Yoink: https://wordpress.stackexchange.com/a/130921
function show_template() {
    if( is_super_admin() ){
        global $template;
        print_r($template);
    } 
}
add_action('wp_footer', 'show_template');