OK this is a dumb question, but Ive searched for about 20 minutes and cant
find any way to do this.
I know it can be done....
Help :P

I'm new to civ4, and I'm having trouble setting a global rally point,
you know, like was so easy in civ3.
I looked at a keyboard & mouse shortcut help file I found on civ
fanatics. It says to 'shift-right-click on any city bars'. So I do; I go

This will be a game based on the classic Civilization games by Sid
Meier.
You'll be the leader of a cannibal tribe and your mission is to become
the most advanced cannibal tribe on the planet.

Does anyone know which data file controls the occurrence frequency of
the special resources - specifically Marble, as it seems to be very rare
normally?