The theme comes with 5 menu locations to which you can assign your menus via WordPress native menus functionality located at Apperance -> Menus. Details about each menu location is given below.
This menu location is located in the top header of main site, you can define any level of regular sub-menus here. However, for UX point of view I would recommend don't go over 1-2 child, otherwise deep children have usually low exposure.
This navigation is also located in the top side header, but it is separate from "Primary Navigation". It is specifically designed to display user account related links, through which user can easily access their dashboard pages.
It is highly recommended to use "Nav Menu Roles" plugin for this menu, because with the help of this plugin you can display different menu items, conditionally, based on logged in "user role" or merely the fact that if the user is logged in or not.
This menu location also supports some additional special menu items. For example, to display the name of currently logged-in user you can create a menu item like this:
This menu location represents the main menu in dashboard template. This menu is also currently support one-level of menu items.
This menu location represents the area just below primary dashboard navigation. Similar, to first dashboard menu location it also supports one-level of menu items.