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 本次的教程文章将帮助您了解如何设置文件窗口,查看器和页面的属性。为了设置这些不同属性,您首先需要使用Document文档类打开PDF文件。在那之后,你可以设置文档对象的属性，最后保存更新后的PDF文件就可以完成了。

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下面是具体的代码示例：

C#

//open document
Document pdfDocument = new Document("input.pdf");
//set different document properties
//sepcify to position document's window - Default: false
pdfDocument.CenterWindow = true;
//predominant reading order; determins the position of page
//when displayed side by side - Default: L2R
pdfDocument.Direction = Direction.R2L;
//specify whether window's title bar should display document title
//if false, title bar displays PDF file name - Default: false
pdfDocument.DisplayDocTitle = true;
//specify whether to resize the document's window to fit the size of
//first displayed page - Default: false
pdfDocument.FitWindow = true;
//specify whether to hide menu bar of the viewer application - Default: false
pdfDocument.HideMenubar = true;
//specify whether to hide tool bar of the viewer application - Default: false
pdfDocument.HideToolBar = true;
//specify whether to hide UI elements like scroll bars
//and leaving only the page contents displayed - Default: false
pdfDocument.HideWindowUI = true;
//document's page mode. specify how to display document on exiting full-screen mode.
pdfDocument.NonFullScreenPageMode = PageMode.UseOC;
//specify the page layout i.e. single page, one column
pdfDocument.PageLayout = PageLayout.TwoColumnLeft;
//specify how the document should display when opened
//i.e. show thumbnails, full-screen, show attachment panel
pdfDocument.PageMode = PageMode.UseThumbs;
//save updated PDF file
pdfDocument.Save("output.pdf");

VB.NET

'open document
Dim pdfDocument As New Document("input.pdf")
'set different document properties
'sepcify to position document's window - Default: false
pdfDocument.CenterWindow = True
'predominant reading order; determins the position of page
'when displayed side by side - Default: L2R
pdfDocument.Direction = Direction.R2L
'specify whether window's title bar should display document title
'if false, title bar displays PDF file name - Default: false
pdfDocument.DisplayDocTitle = True
'specify whether to resize the document's window to fit the size of
'first displayed page - Default: false
pdfDocument.FitWindow = True
'specify whether to hide menu bar of the viewer application - Default: false
pdfDocument.HideMenubar = True
'specify whether to hide tool bar of the viewer application - Default: false
pdfDocument.HideToolBar = True
'specify whether to hide UI elements like scroll bars
'and leaving only the page contents displayed - Default: false
pdfDocument.HideWindowUI = True
'document's page mode. specify how to display document on exiting full-screen mode.
pdfDocument.NonFullScreenPageMode = PageMode.UseOC
'specify the page layout i.e. single page, one column
pdfDocument.PageLayout = PageLayout.TwoColumnLeft
'specify how the document should display when opened
'i.e. show thumbnails, full-screen, show attachment panel
pdfDocument.PageMode = PageMode.UseThumbs
'save updated PDF file
pdfDocument.Save("output.pdf")