Site Admin: Allow New Users To Register, Options Page?

I really hate to ask this because its probably so obvious, but....

I've set up WP networks before. There used to be a "Super Admin" tab which has been changed to "Network Admin". Before the update I knew I could hit the "Options" tab or "settings" and find the page where you can set things like "Allow new users to register" or "Allow new users to make blogs". I must be blind because for some reason I just can't find this page anymore.

Can someone help.

Thanks in advance!