It seems to me that the "Configure map modes" feature has been removed from the game. I'll delete it from the article but keep it here, if someone finds it.
Map Mode or Toggle
Ctrl + F2
Configure Map Modes
Configure map modes menu.
Configuring map modes with Population selected for the F9 key.
To configure the map mode, first click on the button that opens the configure map modes or press ^CtrlF2, then select one of the 6 map modes to be replaced from the configure map mode menu (reference the graphic on the left within this chart). The all possible map modes window will open to the left of the configure map mode menu. Then select one of the 11 map modes as a substitute. The selection should now be shown in the Map Mode Interface (reference the graphic on the right within this chart). Note: the Default button may be clicked to restore the original map modes.