FontObject WritingMode Property. Gets the font writing mode. ABCpdf .NET PDF Library. From ABCpdf .net previous page next page WritingMode Property Type Default Read Only Description [C#]WritingModeType[Visual Basic]WritingModeType n/a Yes Gets the font writing mode. Notes Gets the font writing mode. The WritingModeType enum has two possible values: Horizontal Vertical Example None. previous page start next page