Volume Mute; Lock (Instant Security); Display Brightness - Toshiba C845-S4230 User Manual

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Hot Keys/TOSHIBA Cards
Hot key functions

Volume Mute

Lock (Instant security)

Display brightness

This hot key enables/disables volume mute on your
computer.
When volume mute is enabled, no sound will come from
the speakers or headphones.
This hot key displays the help file.
This hot key decreases the screen brightness.
This hot key increases the screen brightness.