add editor style Add this method to the function.php file. It will append a stylesheet file in the admin area of WordPress so you can add your custom CSS in the editor. Don't forget to update path to the file. #wordpress#php function add_editor_stylesheet() { add_editor_style( 'path/to/css/file.css' ); } add_action( 'admin_init', 'add_editor_stylesheet' ); copy