Got it... it's actualy in the Manual book page 25-26.
CUSTOMIZE:
LANDMASS
This parameter sets the number of terrain squares that are land.
Small: Choosing this option gives your world a small number of land squares and a
larger number of ocean squares.
Normal: This option yields about equal numbers of land and ocean squares.
Large: This option produces a large number of land squares, and a small number of
ocean squares.
CUSTOMIZE:
LAND FORM
This parameter determines the way in which your world’s land is shaped into
land masses.
Archipelago: This option produces relatively large numbers of relatively small
continents.
Varied: Choosing this option gives your world an average number of average sized
continents.
Continents: This option yields one or two large land masses.
CUSTOMIZE:
CLIMATE
This parameter sets the relative frequency with which particular terrain types occur.
Arid: Choosing this option gives your world a larger number of “dry” terrain squares,
such as Plains and Desert.
Normal: This option yields about equal numbers of “wet” and “dry” terrain squares.
Wet: This option produces a larger number of “wet” terrain squares, such as Grassland,
Forest, and Swamp. It also increases the number and length of rivers generated.
CUSTOMIZE:
TEMPERATURE
This parameter determines the relative frequency with which particular terrain types occur.
Cool: This option produces larger numbers of polar terrain squares, like Tundra and
Glacier.
Temperate: Choosing this option gives your world an average number of each terrain
type.
Warm: This option yields a larger number of tropical terrain, like Desert, Plains, and
Jungle.
CUSTOMIZE:
AGE
This parameter determines whether like terrain squares clump together, or are widely
scattered.
3 Billion Years: This option yields a young world, one in which terrain squares seem
to occur in clusters.
4 Billion Years: This option yields a middle-aged world, one in which glaciation and
plate tectonics have been acting to diversify terrain.
5 Billion Years: This option produces an old world, one in which the forces of nature
and chaos have almost wholly randomized the terrain features.
Surprising no one ever post this info in the net...