The Menu in any of the Themes by InkThemes had a sort of easiness in building. Firstly every theme had a menu which supports the multi-level dropdowns.
For the people who love easiness, they would have their menus automatically created from the Pages that they publish. The subpages that you publish under the main page comes up automatically in the menu dropdown.
Lets say you are a advance user and want to CUstomize the Menu. The Themes have the Custom Menu functionality enabled. So, You can easily create your own custom menus using WordPress. Once you publish the menus, you see your own Custom Menu appearing on your website.