Applying flyout mode to navigation fields
Previously, vertical navigation fields could be displayed only by expanding the menu items in them vertically or horizontally. As a result, navigation fields containing many menu items could require a significant amount of screen space to display all of the items included in a menu.
Configure vertical field menu items to display them in a flyout mode. When users select menu items, those items are displayed to the right of the menu from which they were selected. Submenus also can be set to fly out from their main menu items.
Enabling menu items to be displayed in this mode, as shown in the following figure, can help you make better use of screen space and can enhance the web look and feel for a form.
Flyout navigation menu display
(Click the image to expand it.) 
Use the Mode property in Developer Studio to enable flyout capability for menus displayed in vertical navigation fields on the web. This property has two settings:
- Expandable — Menu items are displayed vertically as expandable lists. (See Expanding-and-collapsing-items-in-the-navigation-bar.)
- Flyout — Menu items are displayed in a parallel list to the right of the menu.
A flyout menu can be displayed either when a menu is clicked or when the user moves the mouse over it.