Represents the "IT" entry of the polygon annotation object.

It is an optional entry defined as part of the PDF 1.6 specification.

It contains a string representing a PDF name object.

This item may take one of the following valid values:.

• PolygonCloud
• PolyLineDimension
• PolygonDimension

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 178, page 403.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 181, page 488.