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Surface Hub provides an on-screen display for volume, brightness, and input control. The Source button is a toggle key to switch between the volume, brightness, and input control menus.
To show the on-screen display
Press and hold the Source button for 4 seconds.
When the on-screen display is visible, use one or more buttons to reach desired settings.
To adjust volume
- Use the Volume up/down button to increase or decrease volume.
To adjust brightness
- Press the Source button again to switch to the brightness menu.
- Use the Volume up/down button to increase or decrease brightness.
To adjust input
- Press the Source button twice to switch to the Source menu.
- Use the Volume up/down button to switch between PC, HDMI, and USB-C inputs.