How do you change iPod password?

for an iPod touch ,to change your passcode go to settings app and there should something called general. You click on it, then it should take you to passcode lock. From there you can chage your code. But if you already have a lock, you have to eneter it in. If you forgot this then you can take it to the Apple store. Or plug it in to your computer and click on your itouch's name. There should be some tabs near the top. Find the right one and there should be a button that says chage pass code.