FormXObject Matrix Property. The transformation matrix used for mapping the Form XObject space into user space. ABCpdf .NET PDF Library. From ABCpdf .net previous page next page Matrix Property Type Default Value Read Only Description [C#] XTransform [Visual Basic] XTransform n/a No The transformation matrix used for mapping the Form XObject space into user space Notes The transformation matrix used for mapping the Form XObject space into user space. This entry may be null which signifies the identity matrix. Example None. previous page start next page