The Per-View Viewport Label menu provides additional options for Nitrous displays.

Quality menu

Textures geometry with shading and lighting as set in the Shading viewport label menu.

Default Shading display
Displays geometry as faceted, regardless of its smoothing group settings. This option is provided as a convenience to modelers, especially character modelers, who want to see the precise geometry they work with.

Facets display (left, smoothing; right, with facets)
Displays only the edges of each object's bounding box.

Bounding-box display
When Bounding Box is active and you also turn on Display Selected > Display Selected With Edged Faces, selected objects appear as wireframes. This option is on the Shading viewport label menu.

Similarly, when Bounding Box is active and you also turn on Shade Selected Objects, selected objects are shaded. This option is in the Selection group on this panel—see below—and on the Views menu; or for Alt menus, Scene menu > Configure Views.

When selected, building walls appear shaded in a bounding-box viewport.
Shade Selected Objects is turned on.
Shades geometry with flat colors disregarding the lighting. Shadows however are still displayed.

Flat Colors display
Hides faces and vertices whose normals point away from the viewpoint, as well as any parts of objects that are obscured by closer objects. Shadows are displayed.

Hidden Line display
Displays geometry as a uniform terracotta color. This option can be helpful to modelers who don't want to be distracted by the texture of an object.

Clay display (left, realistic shading; right, clay shading)
Similar to Default Shading, however shades the faces based on the visible edges when there are no smoothing groups, while Default Shading shades based on the triangulation, matching the rendering output. Model Assist mode can be handy for viewing the overall flow of a model without additional visual distraction. The effect of the shading mode is only visible for edit poly and editable poly.

Object detail with Default Shading enabled

Object detail with Model Assist enabled
Displays a submenu of non-photorealistic styles to select: Graphite, Color Pencil, Ink, Color Ink, Acrylic, Pastel, and Tech.
Overrides visual settings to display geometry in wireframe mode.

Wireframe display
Shows face edges in the viewport.
Displays a submenu with options for displaying faces that are selected: either with edges or shaded.
Displays a submenu with options for the viewport background.
Opens the Viewport Setting and Preference dialog.
To customize the Per-View Preference Label menu: