knoppix autologin

can someone pls explain?

1. why is knoppix login under knoppix user without password?
2. how to log in with other created user on graphical login?
3. how to disable autologin and make system to ask for login and choose the user for login?

( I got installed 7.2 knoppix on my HDD, but still dont understand what is the benefit of login without password )

thanks in advance for potential answers

Knoppix is designed as a Live System and therefore as a single user system without the need of a password. If you want to do a HD install read "Install Warning" first.