How to add sub-pages

Hi,

I do not have any sub pages showing in any kind of drop-down in the menu. I am not sure if every theme supports this.

E.g. What I want is that when the user moves its cursor/clicks on the pages in the menu at the top, all the sub-pages should get displayed in a drop-down.

I am using greyzed theme.

Please tell me if I am unaware of such method using which I can have a simple drop-down type menu for pages, sub-pages.

Thanks,
Sahil
http://freakyengineers.com/