Dell UltraSharp 42.51" 4K Monitor - Manual (Page 59)

Operating the monitor | 59
Icon Menu and
Submenus
Description
Audio
Display
PIP/PBP
Input Source
Color
USB
Brightness/Contrast
Exit
UltraSharp 43 Monitor
Menu
Audio
Personalize
Others
Volume
Speaker
Reset Audio
On
Audio Source Window1
50
Volume Allows you to set the volume level of headphone output.
Use the joystick to adjust the volume level from 0 to 100.
Audio source Allows you to set the audio source from the main Window 1,
Window 2, Window 3 or Window 4.
Speaker Select On or Off the Speaker function.
Reset Audio Resets all settings under the Audio menu to the factory
defaults.