View layouts provide you the option to customize the document's layout and the way the PDF document may appear. PDF for .NET allows you to display the PDF documents in various layouts using PageLayout property of the PdfViewerPreferences class. The PageLayout property sets the page layout to one of the following layouts using the PageLayout enumeration:

Enumeration Values	Snapshot	Descriptions
OneColumn	OneColumn	Displays the pages in one column.
SinglePage	SinglePage	Displays one page at a time.
TwoColumnLeft	TwoColumnLeft	Displays the pages in two columns, with odd-numbered pages on the left.
TwoColumnRight	TwoColumnRight	Displays the pages in two columns, with odd-numbered pages on the right.
TwoPageLeft	TwoPageLeft	Displays the pages two at a time, with odd-numbered pages on the left.
TwoPageRight	TwoPageRight	Displays the pages two at a time, with odd-numbered pages on the right.
ViewerDefault	ViewerDefault	Uses the current viewer default without any specified layout.

To set the view layout for Pdf document, use the following code.

pdf.ViewerPreferences.PageLayout = PageLayout.TwoColumnLeft;