The Navigator displays the material and maps in the active sample slot. You can navigate the hierarchy of the current material by clicking the material or map listed in the Navigator. Conversely, as you navigate the material in the Material Editor, the current level is highlighted in the Navigator. The selected material or map becomes active in the sample slot, while the rollouts for the selected material or map are displayed below.
You can also drag from the Navigator to any valid sample slot or button in the user interface.
Use the view buttons at the top to change the display. The list displayed in the Navigator is similar to the one displayed in the Track View hierarchy.
Also, the names of instanced materials and maps appear in boldface.
Both of these effects are shown in the following illustration:
The view buttons are as follows:
The large icons are labeled with the name of the material or map and are displayed using progressive refinement. That is, samples are rendered quickly, with large pixels, then rendered a second time in greater detail.