您只需要通过菜单文件→选项…→浏览器和检查类型启用查看类型：
根据pgAdmin的documentation：
The list of check Boxes is used to select which object types to show in the browser tree. By default,only the most commonly used object types are shown. Reducing the number of object types shown can increase the speed of pgAdmin when querying the system catalogs. Use the Default button to reset the list to its default settings.
