Single Template that can be applied only via URL
You can add a query string to your URLs and read that using the $_GET global. For example, you could add ?template=main to your posts’s URL. Then, in the single-cpt.php for your CPT, use <?php if ( isset( $_GET[‘template’] ) ) $mytemplate = $_GET[‘template’]; ?> Then, around the bits that you want to display differently, … Read more