MSI Wind U230-033US User Manual page 64

3-22
Quick Launch [Fn] Buttons
Use the [Fn] buttons on the keyboard to activate the specific applications or tools.
With the help of these quick launch buttons, users will be able to do work more efficiently.
+
User Defined
Decrease the built-in speaker's volume.
+
Increase the built-in speaker's volume.
+
Disable the computer's audio function.
+
Force the computer into sleep state (depending on the system
configuration).
+
Press and hold the Fn button, and then press the F4 button to
launch the User Defined application.