Lenovo ThinkPad T450s Maintenance Manual page 52

Table 8. Function keys (continued)
Function key and Description
key combination
Fn+Spacebar 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.
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Hardware Maintenance Manual
3. Select the options of your preference.