How to make admin approve new people

[SycoKill3r]

ITs been forever since i used smf , how do i make it so i have to approve people for joining the site because i just started site like 2 hours ago and i have spammers putting stuff in my forums.

[Chalky]

Admin > Members >Registration > Settings. First setting drop down 

[Kindred]

http://wiki.simplemachines.org/smf/Spam_-_my_forum_is_flooded_with_spam,_what_can_I_do

http://wiki.simplemachines.org/smf/SMF2.0:Registration#Settings