Use a text editor such as notepad to edit the "game.ini" file in the "system" folder. Find the following lines.

[HGame.baseConsole]
bDebugMode=False
bUseSystemFonts=True

Then, change them to read as follows.

[HGame.baseConsole]
bDebugMode=True
bUseSystemFonts=True

Press one of the following keys during game play to activate the corresponding cheat function.

Effect	Key
Change game speed	[Page Up] or [Page Down]
Full health	[F6]
Learn all spells	[F9]
Level select	[F4]
Toggle console window	~
Toggle ghost mode	[Delete]