Represents the "RT" entry of the floating window parameters dictionary object.

It is an optional entry defined as part of the PDF 1.0 specification.

It contains an integer representing a PDF numeric object.

The PDF specification states that this item assumes a value of 0 if no value has been provided.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 284, page 500.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 295, page 626.

The RT entry names the window position reference type: 0 for no forced position, 1 to centre in the annotation rectangle, 2 to centre in the page, 3 to centre on screen, 4 to position at the top-left of the annotation, and 5 to position at the top-left of the page.