Dell U4919DW Display Manager Users Guide - Page 8

You can select video inputs for your main window and sub window. Please save your change after your selection. You can define a shortcut key to quickly swap the video inputs between main window and sub window. Click Video swap button or use the defined Video swap shortcut key to swap the video inputs between main window and sub window. You can assign a USB upstream port with your video input. The assigned USB upstream port will be connected to the computer when its video is showing on the monitor. It is particularly useful when you share mouse or keyboard which is connected to the monitor between two computers. You can define a shortcut key to quickly switch the device between the two computers. 8 │ Dell Display Manager User's Guide