您可以通过以下操作将已圈出的特色图像元盒添加到自定义帖子类型：

register_post_type( \'yourCPTslug\', [
    //...
    \'supports\' => [\'title\', \'editor\', \'thumbnail\'] // note: thumbnail
] );


add_action( \'after_setup_theme\', function () {
    add_theme_support( \'post-thumbnails\' , [\'yourCPTslug\'] );
});