[Kind of] A dumb newbie question

Hey guys,

so I'm still new to the whole MacBook thing and I have a question. When i have two programs open, say iTunes and Safari, I'll go to click one on the dock and it'll kind of shift over and a little picture will show up with four squares and an arrow. Now I've heard of this before, something along the lines of different "screens" but I have no idea how I did it, or how to reverse it, or how to make it happen again! help!!

control and arrow button OR click and drag the program left, right, up, or down.

I tried both of those and no luck

open up your system preferences, then go to Expose & Spaces, play around with those settings.

ok, one more question. How do I get all my programs back into one "space"

oh, nevermind, just got it