Dell U3419W UltraSharp Monitor Users Guide - Page 48

Operating the Monitor, Contrast Sub, USB Selection, Setting the KVM Switch

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Contrast (Sub) Adjust the contrast level of the picture in PIP/PBP Mode. Press the button to increase the contrast and press the button to decrease the contrast. USB Selection Allows you to set the USB upstream port for the input signals (DP, HDMI 1, and HDMI 2), thus the monitor's USB downstream port (eg. keyboard and mouse) can be used by the current input signals when you connect a computer to either one of the upstream ports. See also Setting the KVM Switch for details. When you use only one upstream port, the connected upstream port is active. NOTE: To prevent data damage or loss, before changing USB upstream ports, make sure that NO USB storage devices are in use by the computer connected to the monitor's USB upstream port. 48 │ Operating the Monitor

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Operating the Monitor
Contrast (Sub)
Adjust the contrast level of the picture in PIP/PBP
Mode.
Press the
button to increase the contrast and press
the
button to decrease the contrast.
USB Selection
Allows you to set the USB upstream port for the input
signals (DP, HDMI 1, and HDMI 2), thus the monitor's
USB downstream port (eg. keyboard and mouse) can be
used by the current input signals when you connect a
computer to either one of the upstream ports. See also
Setting the KVM Switch
for details.
When you use only one upstream port, the connected
upstream port is active.
NOTE:
To prevent data damage or loss, before changing
USB upstream ports, make sure that NO USB storage
devices are in use by the computer connected to the
monitor’s USB upstream port.