You can choose from multiple options to display your scene. You can display objects as simple boxes, or render them with smooth shading and texture mapping. If you want, you can choose a different display method for each viewport.
Box display, wireframe display, and smooth shading
Viewport rendering options are found on the and on the of the Viewport Configuration dialog. Using these controls you can set a rendering level and any options associated with that level. The viewport label menu settings apply to the active viewport only, but the Rendering Method panel lets you apply settings to the active viewport, all viewports, or to all but the active viewport.
The rendering level you choose is determined by your need for realistic display, accuracy, and speed. For example, Bounding Box display level can be much faster than Smooth + Highlights, depending on scene complexity. The more realistic the rendering level, the slower the display speed.
The rendering methods not only affect the quality of your view display, they can also have a profound effect on display performance. Using higher quality rendering levels and realistic options slows display performance.
After setting a rendering method, you can choose additional options that adjust display performance. One of these controls, Adaptive Degradation, speeds up display performance when you use realistic rendering levels.