To learn the basic skills needed to create menus, go to the WordPress Menu User Guide.  

You can find the Menu section on the WordPress dashboard under APPEARANCE > MENUS.

The WordPress Menu user Guide explains how sub-menus typically work in WordPress. See below for a quick example:

In this example, the user dragged the menus into their current hierarchy, where "Alumni" has the sub-menu item "Your Alumni Association," and sub-sub-menu items "Benefits,"  "Alumni Events,"  "Join the Alumni Association,"  and "Renew."  Using the Flex2 theme, this menu looks like this on the live site:



Notice that "Benefits," "Alumni Events," "Join the Alumni Association," and "Renew" are indented under "Your Alumni Association."

GSU's custom themes allow for another way to include sub-menus.  By clicking on the down arrow, you can access the Sub Menu drop-down list:

 

In the Sub Menu drop-down list, the user selects from other menus created for the page.  In this example, the "About" menu is another menu created by the user: 

In each menu option, we also have the option to add custom CSS such as the "call-to-action" tab on the site. To view this option, click "Screen Option > CSS Class" and then in the CSS field, add the CSS: call-to-action

If the menu will have a lot of menu and sub-menu items, creating multiple menus and selecting them in the Sub Menu drop-down list may be helpful in keeping the menus well-organized, and it allows for the same sub-menu to be used in multiple places -- for example, like in a widget used to display the sub-menu on sub-pages.