Dell UltraSharp 30 User Manual page 15

Also,The PIP / PBP function can be used in this interface.
Then click Finish to complete your options.
NOTE: DDM communicates with your monitor even when the monitor
is displaying video from another computer. You can install DDM on the
computer you frequently use and control input switching from it. You may
also install DDM on other computers connected to the monitor.
Managing Multiple Video Inputs | 15