Ambient light color index.
Back clipping plane setting.
Center point of the viewport.
Indicates if default lighting is enabled.
Default lighting type.
Front clipping plane setting.
Grid spacing setting.
Lens length for the viewport camera.
Lower-left corner of the viewport.
Name of the viewport.
Orthographic projection type.
Owner handle reference.
Render mode for the viewport.
Snap base point for the viewport.
Snap rotation angle in radians.
Snap spacing setting.
UCS origin point.
UCS X-axis vector.
UCS Y-axis vector.
Upper-right corner of the viewport.
Viewing direction vector from the target.
View height of the viewport.
Viewing target coordinates.
View twist angle in radians.
Represents a DXF viewport table entry.