In Multiplicity Pro, on the Primary computer under the KVM tab, you can connect to a remote secondary computer to show that computers display as a window.
...
To add a KVM connection display to the list, click the plus icon (1). The following prompt will appear for adding the connection via computer name or list of available computers:
...
Once a computer selected, configuration settings will open for entering the computers Passcode, and Display name to appear on the grid.
KVM mode display can also be selected for different scaling of the original display size.
...
(4) The gear icon can be clicked to open Advanced KVM settings:
...
To access to an available KVM connection, three quick access options (5,6,7) can be used once the connection is added, configured, and selected:
...