I don't quite understand the difference between menus (Appearance/Menus) and creating menus by choosing a parent page (and adding an Order number in the Order box) while editing a page - when to use which system; what are the reasons for choosing the one above the other?
I am helping a friend with an academic website which already has about 86 pages. At the moment it uses the parent-page / order-box system, but I'm trying to simplify it by creating a menu - but I can see that that might also become very difficult to manage.
I also don't understand why there is an option to create two menus. (I have read the support pages,and I'm still confused.)