Sorry, very long question. I've only had my camera for about a year and I'm 16. I just got done reading (yes, reading) a photography book called Rick Sammon's Field Guide to Digital Photography and he kept talking about changing the exposure. I know how to on my laptop when I'm editing, but I don't know how to on my camera. I got a feel for it but whenever I go to click on "White Balance" underneath the green tab of shooting settings (something like that, sorry I'm clueless) it says it's not available. Please help!