Dell P2016 User Manual page 30

Menu and
Icon
Submenus
Input Source
Auto Select
VGA
DP
30 | Operating the Monitor
Description
Use the Input Source menu to select between different video
inputs that are be connected to your monitor.
Use to select Auto Select, the monitor scans for available
input sources.
Select the VGA input when you are using the analog (VGA)
connector.
Use to select the VGA input source.
Select DP input when you are using the DP connector.
Use to select the DP input source.