Part of the Atlas (Scenario Editor) Manual
Note: Player here refers to the "gameplay player", i.e. units and buildings belongs to a certain "player", rather than an individual who is playing the game.
Number of players: Set the number of players on the map. From one to eight (Not including Gaia).
Player selection dropdown: Click to select the player you want to edit, the settings below the dropdown updates depending on the player.
Name: Enter the name you want to display for this player. The player name is different from the user name (either entered at game start for multi player or automatically from the user name of your account on your computer) and will either be displayed alongside it or, in most cases, only be used if there is no username specified. For example for the AI.
Civilisation: Set the civilisation for this player. As of Alpha 8 all civilisations except for Romans have been fully included and can be used for all kinds of scenarios, Romans should not be used if you want to use the generate random map feature however.
Colour: Set a colour to be used for this player. Will appear on the units/buildings, on the minimap, for the borders of territories. Clicking the colour will bring up a colour picker (its looks depends on your operating system). Virtually all colours are available, but you should generally choose colours which are different from each other to avoid confusion.
Default AI: Set the AI to be used by default for this player. It's still possible to change it in the setup screen, and it currently doesn't have any effect on human players (eventually setting an AI here might allow a human and an AI to control the same player).
Allows you to set the resources that will be given to this player at the beginning of the game. The maximum is 2147483647, but it's not really recommended to go that high unless you want to set the number as high as possible for testing. If nothing is set the default values are used. If one or more is set that one will use the value set, but the other values will be set to the defaults. Be especially aware of the Pop limit as it's possible to go as high with it, and values too far over the Default of 300 aren't recommended (for sandbox games without an AI you can of course go higher than you otherwise would).
Team: Set the team number of the team this player should be a part of. Currently the values are None, 1-4. None means don't put the player in a team, a number puts the player in a team with the other players who gets assigned the same team number.
Set: Sets the position the camera will have when the game starts. If not set the camera will default to the first Civic Centre, if there is no Civic Centre to the first object belonging to that player that you placed on the map. The rotation and angle of the camera is not possible to set, they remain the default regardless of which angle/rotation you face the map when setting the Starting Camera.
View: Shows the position set for the Starting Camera.
Clear: Clears the position set for the Starting Camera, which then goes back to the default.