From this menu you can control the server in the network by connect to them as a Remote:
How to Remote connection
Connecting as a remote connect your UI to the distant rendering engine of another server
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Refer to the
Smode Net
Remote control a server, Make multiple servers render together, Work with multiple people on the same project
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topic for more information.
The 'Connect To' / 'Disconnect From' the Embedded Smode allows you to remove or reconnect the local UI to the engine.