Change Attitude
     Enable cheat mode, then press Ctrl + Shift + T.

Edit Unit
     Hold  Ctrl + Shift + U to edit a units attributes except the type
of unit.

Edit the Throne Room
     Enable cheat mode, press Q, then click on the spot you wish to edit.

God Mode
     Type god during gameplay.

     You  can build roads and railroads on the ocean. Get a settler or
and engineer into a vessel, go to the position in which you would like
to build the road or railroad. Press R.