WordPress: Changing a drop down menu to a ul

I'm editing a WordPress theme named "Nova", and I'm relatively new to editing P开发者_开发知识库HP.

Currently, the template uses drop-down menus for parent-child pages.

I would like to change that so rather than a drop down menu, there's just columns, with the top row being the parent page, and the rows directly beneath being the child pages.

How would I accomplish this? Thank you! ^_^

The markup is already there, it's just a matter of changing the stylesheet to change the appearance. You don't have to edit any code. Essentially, float the parents so they're next to each other, don't float the children so they appear vertically as a list does by default.