how to add a subdomain?

[machinakias]

Hello all...
just a (silly..?) question....
I have a domain like mybomain.com and i need to create one subdomain like subdomain.mydomain.com

Where do i have to go to do it? Is it "Add new user" ?
i dont see any options to create subdomains like i did in lets say virtualmin..
and i am confuced..

any advice will be helpful....Thanks!

[kilburn]

Users -> swith to the domain's user -> Domains -> add subdomain