Snippets: Alter Page Title Subheading

add_filter( 'wpex_post_subheading', function( $subheading ) {

    // Remove author subheading.
    if ( is_author() ) {
        return '';
    }

    // Display a custom subheading for my_post_type posts.
    if ( is_singular( 'my_post_type' ) ) {
    	$subheading = 'My Post Type Subheading';
    }

    // Return the subheading.
    return $subheading;

} );