User’s Manual 5-3
L550/L555/L550D/L555D
Hot keys
Hot keys (pressing FN + a function or ESC key) let you enable or disable
certain features of the computer.
Mute: Pressing FN + ESC turns the volume on and off.
Lock: Pressing FN + F1 enters “Lock computer mode”. To restore your
desktop, you need to log on again.
Power Plan: Pressing FN + F2 changes the power settings.
Sleep: Pressing FN + F3 switches the system to Sleep mode.
Hibernate: Pressing FN + F4 switches the system to Hibernation mode.
Output: Pressing FN + F5 changes the active display device.
Brightness (Down): Pressing FN + F6 decreases the computer’s display
panel brightness in individual steps.
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