Samsung Q1B - Manual (Page 26)

Volume Control 26
Volume Control
You can control the volume with the Volume Control button or Volume Control program.
Controlling the Volume Using the Volume Control Button
Press the right side (+) of the Volume Control button ( ) to turn the volume up and press
the left side (-) to turn the volume down.
Using the Volume Control Program
Click on the Volume icon ( ) on the taskbar and slide the volume bar up or down.
Alternatively, double-click on the Volume icon ( ) and adjust the master volume control.