With ADT 9.0.0, all of these species have disappeared into Eclipse and, obviously, have returned to hierarchical viewing.
However, with ADT 8.0.0 and ADT 8.0.1, you have these viewing options.
Tree view
The tree view displays your layout as a tree hierarchy. It just shows your hierarchy of layout views. If you click on one of the elements of the view, you will get its View Properties.
View properties
By clicking on one of the elements of the view in the tree, you can view the properties of the presentation of elements in this view. Things like layout options.
Tree overview
A tree overview allows you to navigate the tree hierarchy more easily if the hierarchy is quite large.
Layout view
Using the layout view, you can check the layout element by element. It just shows all the layout elements relative to each other. You can view them as a wireframe.
To use all these types, you first need to connect the device to a computer or start the emulator and start the action whose layout you want to check. Open the Windows view in Eclipse, select the action from which you want to get the layout, and click "Load View Hierarchy" into the tree view. From now on, you can use all different types as described above.
Keep in mind that all of these views are no longer in Eclipse, but again in a standalone hierarchical view in the sdk / tools directory.