OptionalbackgroundBackground object ID for the viewport
Number of sides used for circle tessellation
OptionalextensionThe objectId of the extension dictionary owned by the object. If the object does not own an extension dictionary, then the returned objectId is set to undefined.
Grid major spacing for the viewport
Grid spacing for the viewport
Graphics system view configuration
Lower left corner of the viewport window
The name of the symbol table record
OptionalobjectUnique identifier for the object
OptionalownerIdentifier of the object that owns this object
Snap angle for the viewport
Snap base point for the viewport
Snap spacing for the viewport
Standard flags for the viewport
UCS elevation for the viewport (DXF group 146)
Upper right corner of the viewport window
Interface defining the attributes for viewport table records.