How do I make a custom slayer game red v blue only?

Games Other Halo
1

Because when I set up a custom game (team slayer) people keep changing teams from pink to green etc
So how can I make it red vs blue only?

2

Disable team changing in the game settings.

3

You can’t. Just boot them if they switch.

4

When in the Lobby there is nothing you can do. But to keep them from changing during a game, just disable Team Change from the custom options.