WebMenu feature include: auto-adjust to browser size, unlimited submenus with intelligent positioning, automatic vertical item scrolling, sticky behavior, and mnemonic key support.
In version 4, WebMenu has been refined to fully support the latest web standards. This allows you to use many of the WebMenu features in your next-generation web applications and at the same time leveraging cutting-edge technologies such as HTML5 and CSS3.
Following are list details of the enhancements and new features introduced in WebMenu:
- New intuitive style in WebMenuBar
In version 4, WebDesktop presents a new style in each of its control. Metro style as the latest UI in Windows 8 have been implemented and becomes brand new UI in WebDesktop control. Metro style makes WebDesktop more simple, more tidy, and more attractive for each control’s UI. The intuitive design of Metro style also provide consistency of each control in HTML5.

You can simply use Layout Manager to implement Metro style in WebDesktop.
For more information on how to apply this configuration, see How-To: Using Layout Manager.