How do I change the size of the album art on my iPod?

When I upload album art onto my sixth generation 80gb iPod classic, I can't figure out how to make it full screen on my iPod. Anyone out there know?How do I change the size of the album art on my iPod?i think if you keep pressing (not holding) the center button while the Now Playing screen is on, it might come up. if that doesn't work then i don't think theres a way to do that. apple probably took off that feature in the new ipods. i've tried to do that on my new nano and it doesnt work either