Sunmenus not showing up

Hi there,
Love this theme.

How do i enable the drop down menus from the main menu of links? I have a couple of pages with ‘children’ and want them to appear.

I see on the MorningTime (paid) version demo it has them. Is this a premium supported thing only?

Many thanks in advance for any tip on how to do this!

William
(Webdowell.Eu)