Submenus
Function Introduced:
All the menus described so far have been main menus. The other type of menu is called a submenu. A submenu differs from a main menu in the following ways:
• A submenu is active at the same time as the menu above it. Selecting from the menu above does not close the submenu.
• A submenu does not display its title.
In effect, a submenu acts as an extension to the menu above it. This enables you to display two active menus at the same time, such as if you want the user to choose two options from two exclusive groups of values.