The console does not support a camera tree in live view. This feature is obtained by connecting through a web browser, known as a thin client. Here you will have more freedom to customize how you live view feeds using OWS or connecting if the NVR unit is on the same network.
Below is a screenshot of the console in live view. Notice that it does not have an option for a camera tree.
By connecting using a web browser, you can pull up the camera tree and adjust your cameras accordingly.