HP Z31x 31.1" 17:9 DreamColor Studio Cinema 4K IPS Display - Manual (Page 32)

2. Add a second monitor by connecting a DisplayPort cable between the DisplayPort OUT port on the
primary monitor and the DisplayPort IN port on a secondary monitor.
NOTE: All but the last daisy-chained monitor need to have DisplayPort IN and OUT video ports. The last
monitor in the chain needs only a DisplayPort IN video port.
3. Set a connected monitor to display the same image as the primary monitor or a different image.
4. To connect additional monitors (up to four maximum), press the Menu button to open the OSD menu.
Navigate to Input and then USB-C MST Configuration, and select USB-C Video+USB 2.0 .
5. Connect the DisplayPort cable from the DisplayPort OUT port of one monitor to the DisplayPort IN port
of the next monitor.
24 Chapter 2 Using the monitor