How do you change the code on a David Lloyd lock?

Oh, dude, changing the code on a David Lloyd lock is like changing your socks - you just gotta do it every now and then. First, you enter the current code and press the reset button. Then, you punch in your new code and voilà, you're all set. It's as easy as ordering a Pizza, but please, don't use "1234" as your new code, okay?