A\h! I see now what menus you are talking about! Now I understand what you are referring to, and why it is confusing.
Well, I can give it a try. The example content that "ships" with a default Joomla! installation serves to demonstrate some of the functionality of the system. One of Joomla!'s features is the ability to have "modules" of content display on selected pages (all, pages, only some pages, only a single page, etc.). These "menus" are such modules, and the default Joomla! installation has them set up to demonstrate that you can assign them to be visible when you choose, by having certain of them configured to only display on certain pages.
You can control the display of these modules, and others, from within the Joomla! back-end (administrator) by using the "Extensions -> Module Manager" screen(s) from the menu across the top of the main Administration page. When you open the Module Manager, you will see a list of available modules and other information about them (Enabled, Order. Access Level, Position, Pages, Type, ID).
If you look at the "Pages" column, you will see that different modules are set to display on different pages. You change that behavior, and other aspects of the module (like the displayed title, etc.) for any given module item by editing the module item. To change what pages/menus on which a module is displayed (in this case, the module is a "menu"), select the appropriate radio button and menu items under the Menu Assignment section of the editing screen (below the "Details" section), and "save" the item.
For instance, to have that "Resources" menu module display on all pages, just edit the module from within the Extensions -> Module Manager, select the radio button for "All" from the "Menu Assignment" section, and save it.