Asus ProArt Display PA278QV 27" 16:9 Adaptive-Sync IPS Monitor - Manual (Page 24)

3-6 Chapter 3: OSD (On-Screen Display) menu
5.. Sound
You can adjust Volume, Mute and Source from this menu.
ASUS PA278QV
Standard Mode DisplayPort 2560 x 1440@ 60Hz
Volume
Mute
Source
Sound
•. Volume : the adjusting range is from 0 to 100.
•. Mute : toggles the monitor sound between on and off.
•. Source : decides the monitor sound comes from which source.
6.. Input.Select.
In this function, you can select your desired input source.
ASUS PA278QV
Standard Mode DisplayPort 2560 x 1440@ 60Hz
DVI
HDMI
DisplayPort
Mini DisplayPort
Input Select