During gameplay press F12 to bring up the console then enter a code below:

Code - Result

rubber - Get rubber
coal - Get coal
steel - Get steel
manpower - More men
oil - Get oil
supplies - 500 supplies
escorts - more escorts
nuke - 1 nuke
war - everyone wants war
nowar - AI doesn't want war
di - Diplomatic influence set to 500
nolimit - troop building limits gone
norevolts - AI revolt toggle
nofog - Fog of war toggle
handsoff - Auto event pause toggle
difrules - Invincibility toggle
fullcontrol - control all nations toggle
showid - province ID toggle
event 1013 - More industrial capacity
transports - More transports