修复WordPress中未显示自定义字段的问题 （Fixing Custom Fields Not Showing Issue in WordPress）
自定义字段 are typically associated with WordPress post, pages, or 自定义帖子类型. Often you will find custom fields mentioned in various WordPress 教程 around the web, but you will likely not see the custom fields option on your site specially if you recently 开始您的 WordPress 博客.
Simply create or edit an existing post / page, and then click on the ‘屏幕选项‘ button at the top right corner of the screen. This will show you a menu with several options that you can show or hide on your post edit screen.