The exposure is made up of 3 parts that you'll really care about: Aperture opening, Shutter speed and ISO (film speed). I usually only mess w/ the last 2 depending on what I'm trying to do.

Any settings related to that?

More experienced guys, feel free to add more or correct me if i misspoke.

here's a good read for ya as an overview:
http://www.sederquist.com/claexpos.html