Page scrolling cant can add a link in menu

Hello i have question because im hopeless…How do a section scrolling? I loking on video but in menu a dont know where put a name of have section.

screen:

Hello Tomas,

Please check this guide:
http://easywpguide.com/wordpress-manual/appearance/updating-the-menu/adding-a-custom-link-menu-item/

Please feel free to ask any other questions that you might have.

Kind Regards, Roman.