Description:
If this object is associated with a document, this gets the document ground plane. If this object is associated with a File3dm, this gets the File3dm's ground plane. Otherwise it gets a 'free-floating' ground plane object.
Syntax:
If this object is associated with a document, this gets the document ground plane. If this object is associated with a File3dm, this gets the File3dm's ground plane. Otherwise it gets a 'free-floating' ground plane object.