Posts from Three against one.
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Клан "Вершители Асхана" - "Masters of Ashan"
There's nothing simpler. You need to go to the Map Properties tab, select the Teams tab, and then assign all players to groups. Units that are in the same group are allied. If you're creating such a map, you can first place all the players, then perform the operation mentioned above, and put a checkmark (rather, a circle) next to the number 2. This will put all the opponents in one group, and you will remain separate from them.
Клан "Вершители Асхана" - "Masters of Ashan"
Ah... So that's what you mean. Well, I can't help you with that. I always create maps from scratch:D
But when you create a map from scratch, you know it "inside and out"... If you create a map, it should be for other people. If it's for yourself, then you already know everything about it, you don't even need to send scouts to explore the territory, you remember everything by heart...
Клан "Вершители Асхана" - "Masters of Ashan"