i-tec CATRIPLE4KDOCKPD Manual Del Usuario página 9

Now you can set Extend and Mirror mode:

Mirror mode: on the monitor select the 2nd Monitor, select Several monitors → Mirror this display
→ OK.

Extend mode: on the monitor select the 2nd Monitor, select Several monitors → Extend this display
→ OK.
By selecting the "Set this monitor as primary" field, you select the additional monitor as the primary
monitor.
By clicking on the second monitor and moving it you can position this monitor as required relative to the
original monitor of your laptop / tablet.
Placing one additional monitor to the original laptop / tablet monitor
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Display Resolution in Windows 10