Press [F12] while playing the game, type one of the codes below, then press [Enter] to enable that particular cheat code:

Additional transports - transports
Additional prestige - prestige
Additional money - money
Additional leaders - leadership
Additional men - manpower
God type rules - difrules
No war - nowar
Defeat all enemies - norevolts
Disable troop limits - nolimit
Disable fog - nofog
Hands off all - handsoff
Display Province IDs - showid
Total control - fullcontrol