Represents the "PageLayout" entry of the catalog dictionary object.

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

It contains a string representing a PDF name object.

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

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

• SinglePage
• OneColumn
• TwoColumnLeft
• TwoColumnRight
• TwoPageLeft
• TwoPageRight

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 28, page 73.

Adobe Supplement to the ISO 32000, BaseVersion: 1.7, ExtensionLevel: 3; Table: 3.25, page 23.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 29, page 99.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 242, page 458.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 245, page 555.

The PageLayout entry names the initial page layout mode when the document is opened. Values include SinglePage, OneColumn, TwoColumnLeft, TwoColumnRight, TwoPageLeft, and TwoPageRight.