The Director - Can you see what difficulty modifier you are at, and modify it?

In Left4Dead, they say that the game runs an 'AI Director' that will make things harder if you are having too easy of a time, and make the game easier if you are having a hard time.

I would guess that 'Director modifier' is a value you could consult/change.

So is there a way to see the value of the 'Director difficulty' and is there a way to change it (like lock it to the easiest/hardest director or something like that)

The closest and most accessible modifier to change the 'attitude' of The Director is the difficulty option from the level select screen or the in-game pause menu. On higher difficulties The Director will spawn weapons and supplies less frequently and generally be less hospitable to the players/survivors.

To change individual values that the director controls you'll need to refer to the console commands page to modify individual aspects of the game. This can include the rate that special infected spawn, the aggro range of a witch, limiting the availability of ammunition, or even disabling The Director entirely.

It is noteworthy that the console commands are only available on the PC version of Left 4 Dead. Console players will only be able to modify the difficulty from the menus explained above.