HP Compaq Presario CQ42-152TU Notebook PC - Manual (Page 38)

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 fn key (1) and the esc key (2).
Pressing fn+esc displays information about system hardware components and the system BIOS version
number.
To use a hotkey command on the computer keyboard, follow either of these steps:
● Briefly press the fn key, and then briefly press esc .
– or –
● Press and hold down the fn key, briefly press esc , and then release both keys at the same time.
28 Chapter 3 Pointing devices and keyboard