Lenovo ThinkPad W541 (English) Hardware Maintenance Manual - ThinkPad T540p, W - Page 50

Table 8. Function keys (continued) Function key and key combination Description Press Fn+Esc to enable or disable the Fn Lock function and switch between default + mode and legacy mode of using the function keys. • When the Fn Lock function is disabled: The Fn Lock indicator is off (default mode). To initiate the special function of each function key, press the corresponding function key directly. To input F1- F12, press the Fn key and the corresponding function key. • When the Fn Lock function is enabled: The Fn Lock indicator turns on (legacy mode). To input F1- F12, press the corresponding function key directly. To initiate the special function of each function key, press the Fn key and the corresponding function key. Controls the keyboard backlight. + There are three modes for the keyboard backlight: Off, Low, and High. Press Fn+Spacebar to change the modes of the keyboard backlight. Fn+B Has the same function as the Break key on a conventional keyboard. Fn+P Has the same function as the Pause key on a conventional keyboard. Fn+S Has the same function as the SysRq key on a conventional keyboard. Fn+K Has the same function as the ScrLK key on a conventional keyboard. 44 Hardware Maintenance Manual