SubMenu Navigation
Problem
Provide a way for users to select an action from a set of option when selecting a menu item.

Solution
Sub menu is like a small widget which needs user response about selecting an option from a given set of options.

Design Patterns
submenu1.jpg
submenu2.jpg
To Avoid
1. Long list of options that take up more than half the screen . Consider using a hub/ dashboard design instead.
2. Inconsistency between the menu and sub-menu navigation style.