DEC GTX5166M Service Quick Reference Manual page 31

Overview
+ Function
Turns the battery display information On and Off.
Reserved for future use.
Toggles the system sound between mute and unmute.
Enables and disables the keyboard's embedded key
pad. The state of this key is shown in the LCD status
display. This hot key is used in conjunction with the [F9]
hot key to control the embedded key pad.
Toggles NUM Lock On and Off. The state of NUM
Lock is shown in the LCD Status Display. This hot key
is used in conjunction with the [F8] hot key to control the
embedded key pad.
Toggles Scroll Lock On and Off. The state of Scroll
Lock is shown in the LCD Status Display.
Depress repeatedly to increase the audio volume.
Depress repeatedly to decrease the audio volume.
Depress repeatedly to decrease the LCD screen
brightness.
Depress repeatedly to increase the LCD screen
brightness.
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