HP Compaq Presario CQ42-210AU Notebook PC - Manual (Page 37)

f1 Opens Help and Support, which provides information about your Windows operating
system and computer, answers to questions and tutorials, and updates to your
computer.
Help and Support also provides automated troubleshooting and links to support
specialists.
f2 Decreases the screen brightness level incrementally when you hold down this key.
f3 Increases the screen brightness level incrementally when you hold down this key.
f4 Switches the screen image among display devices connected to the system. For
example, if a monitor is connected to the computer, pressing this key 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 from the computer using the external
VGA video standard. The switch screen image key can also alternate images among
other devices that are receiving video information from the computer.
f5 Plays the previous track of a CD or the previous section of a DVD or a BD.
f6 Plays, pauses, or resumes a track of an audio CD or a section of a DVD or a BD.
f7 Stops playback.
f8 Plays the next track of an audio CD or the next section of a DVD or a BD.
f9 Decreases speaker volume incrementally when you hold down this key.
f10 Increases speaker volume incrementally when you hold down this key.
f11 Mutes or restores speaker sound.
f12 Turns the wireless feature on or off.
NOTE: This key does not establish a wireless connection. To establish a wireless
connection, a wireless network must also be set up.
prt sc Takes a snapshot or picture of your computer screen and copies it to the clipboard.
Using the hotkey
A hotkey is a combination of the esc key (1) and the fn key (2).
Pressing fn+esc displays information about system hardware components and the system BIOS version
number.
Using the keyboard 27