How do you make slots when u create a game already say computer and cant be joined

When i create with my custom map it shows force2 which is all computers as an open slot, is there a way for me to lock that slot at computers? Thanx

Go to the player properties section, then make whatever you want into a computer.

after you changed player properties, there is

[_] fixed start position

or something like this

add the [X] there, this will "lock" this settings