How to set up colocation with server ?

Hey grindinggear, thanks for the question about Multiplayer building blocks. Could you share more about what you want to achieve with netcode startServer and startClient?

If you choose the Unity Netcode flavour of the Colocation block, it already starts a server under the hood for the first player, and start as clients for subsequent players. If you don't want to automatically start, you can toggle off the option in the Colocation block components and call the public start as host/guest functions yourself by hooking up to your UIs etc.