Where's the option for player start spawn character?

I am working on a zombie survival game and I am using 4.10.4 (downloading 4.12.1 now) and I can’t find the option to spawn which character on player start.

I clicked on my player start and scrolled down the settings screen to find an option to spawn which player but it isn’t there.

Please let me know where it is.

Thank You.

You change the default player within the gamemode. If you’re trying to do it ingame? Well then you’ll need to design a character select.

Thank You for telling me