If the list is empty, you need to install a default printer for your operating system. Refer to the on-line help for your operating system for instructions on how to install and set-up a default printer.
如果列表为空，则需要为操作系统安装默认的打印机。请参阅操作系统的联机帮助，以获得安装和设置默认打印机的说明。