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Since we've started with the tree method, let's continue with it. As I mentioned, in MapPropertiesTree, below the CustomTeams line, there's a line called players. Inside, you'll find the settings for all players (from 0 to 7). Open, for example, player 1 (you don't need to change player 0), find the Team property, and change it from 1 to 0. As a result, player number 2 will be on the same team as player 1 (as I already said, the numbering starts from zero). You need to do the same with the other two, but change the Team property to 1.