View Editor 

The View Editor, which is integrated in the Workbench, is a powerful tool for creating and editing views, that is, the central module of a Web Dynpro application.

A view has both a graphical layout and a controller with a context, attributes, methods and actions. Views also have inbound and outbound plugs with which the navigation from one view to the next (or even to an interface view) can be defined.

Properties

On the Properties tab page you can influence the view’s lifetime:

Framework controlled	The view data is kept until the calling component is exited.	Default
When visible	The view data is kept for as long as the view is displayed in the browser.  A view may be visible in the technical sense as part of a view set, although its content on the screen may be a hidden tab in the background, for example. In this case the view data is still available as before, and the view exists.

If, in the controller of your view, you want to use the functions of a different controller, first of all you have to define a controller usage on the Properties tab page. To do this, choose Create and then choose a controller from the list by double-clicking it. This list displays all available controllers, that is, all component-owned, cross-view controller and all interface controllers of the components for which a component usage was declared. Choose Delete to remove the controller usage from the table again.

  For each view, when it is created the usage of the component controller is always entered automatically, as this is almost always required.