Scenario Menu

Properties | Display the scenario properties dialog, which allows you to set the scenario title, description, number of players, and barbarian activity level.
Player Properties | Displays the player properties dialog, which allows you to set the characteristics and values of all individual players in your scenario. Note that this menu option is only enabled when "Custom Player Data" is checked.
Custom Player Data | When checked, enables custom player properties, and the player propertied dialog.
Custom Map | When checked, the scenario is assumed not to have a map file (e.g., custom rules only)
Custom Rules | When checked, the scenario uses the default Civ III rule set.