Dell E2715H Monitor - Manual (Page 41)

Operating the Monitor
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Input Source
(for E2715H
only) Use the Input Source menu to select between different
video signals that may be connected to your monitor.
Auto Select Select Auto Select to scan for available input signals.
VGA Select VGA input when you are using the analog (VGA)
connector. Push to select the VGA input source.
DVI-D Select DVI-D input when you are using the Digital (DVI)
connector. Push to select the DVI input source.
Displayport Select Displayport input when you are using the DP
connector. Push to select the DP input source.
Color Use the Color menu to adjust the monitor's color settings.