FN键位于键盘左下角

　　注意:有些ThinkPad会在拔掉外接电源时自动调整LCD亮度,这是正常现象
     
    

　　英文原文:

　　http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-67495

　　To increase the brightness setting of your ThinkPad LCD display, press and hold the Fn key, then press the Home key. To decrease the brightness, press and hold the Fn key, then press the End key.

　　The Fn key is typically located at the bottom-left of your keyboard and looks like this:

    

　　Note
    

　　Some ThinkPad LCDs will automatically dim when the AC Power is unplugged. This is to save battery power and is normal