HP ProBook 645 G1 Notebook PC - Manual (Page 44)

Hot key
combination Description
fn + f3 Initiates Sleep, which saves your information in system memory. The display and other system
components turn off and power is conserved.
To exit Sleep, briefly press the power button.
CAUTION: To reduce the risk of information loss, save your work before initiating Sleep.
fn + f4 Switches the screen image among display devices connected to the system. For example, if a
monitor is connected to the computer,
fn + f4 alternates the screen image from computer display to
monitor display to simultaneous display on both the computer and the monitor.
Most external monitors receive video information on the computer using the external VGA video
standard. The
fn + f4 hot key can also alternate images among other devices that are receiving video
information on the computer.
fn + f6 Decreases speaker volume.
fn + f7 Increases speaker volume.
fn + f8 Mutes or restores microphone sound.
fn + f9 Decreases the screen brightness level.
fn + f10 Increases the screen brightness level.
Using keypads
The computer includes an embedded numeric keypad or an integrated numeric keypad. The
computer also supports an optional external numeric keypad, or an optional external keyboard that
includes a numeric keypad.
Using the embedded numeric keypad (select models only)
34 Chapter 4 Navigating using the keyboard, touch gestures and pointing devices