HP EliteBook 2740p Tablet-PC - Manual (Page 67)

Viewing battery charge information
Press fn+f8 to display charge information for all installed batteries. The display indicates which
batteries are charging and reports the amount of charge remaining in each battery.
Decreasing screen brightness
Press fn+f9 to decrease screen brightness. Hold down the hotkey to decrease the brightness level
incrementally.
Increasing screen brightness
Press fn+f10 to increase screen brightness. Hold down the hotkey to increase the brightness level
incrementally.
Activating the ambient light sensor
Press fn+f11 to activate and deactivate the ambient light sensor.
Using the keyboard 55