Menu is a totally new concept in osCommerce v4 that comes built in and "out of the box".  Instead of website menu being effectively a copy of the category tree in previous versions of osCommerce, in version 4 we have created a totally separate entity for menus, which can be embedded into any part of any page.  And so, Menus are managed from a special section of the back end: You can switch between different menus existing in the system or create a new one. It is p