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How to integrate PDF Viewer control in WPF app (.NET)
Creating WPF PDF Viewer supporting bookmarks (.NET)
Cross-platform PDF Viewer using GTK# (MONO)
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Convert pdf to image in Silverlight app (C# sample)
How to set fallback fonts for PDF rendering (C#)
Avoiding the out-of-memory exception on rendering (C#)
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Use custom ICC profile for CMYK to RGB conversion
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Convert HTML to PDF using flow layout API (C# sample)
How to use custom fonts for PDF generation (.NET)
Create document with differently sized pages (C#)
Create PDF documents using MONO (C#/MONO/Windows/OSX)
How to use background images for content elements (C#/PDF Kit/FlowLayout)
Add transparent images to PDF document (C#)
Draw round rect borders in PDF documents(C#)
ICC color profiles and and ICC based colors in PDF (C#)
How to use bidirectional and right to left text in PDF (C#)
Create PDF documents from XML templates (C# sample)
How to resize PDF pages and use custom stamps (C#)
Add header and footer to PDF page (.NET sample)
How to use clipping mask for drawing on PDF page
Fill graphics path with gradient brushes in PDF (Shadings)
Apitron PDF Kit and Rasterizer engine settings
Add layers to PDF page (optional content, C# sample)
How to create free text annotation with custom appearance

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How to set PDF document information and PDF reader settings


Every PDF document can have a handful of information regarding its author, title, summary, associated keywords and so on. All these records are stored in so-called Document Information Dictionary described in section 14.3.3 Document Information Dictionary of the PDF specification. It’s possible to alter this information in order to provide the document with descriptive metadata suitable for further automated analysis and identification. E.g. a search engine may quickly analyze the Keywords set instead of indexing the complete document. These predefined “fields” are standardized, and can be used for various purposes by all applications in addition to custom document form fields.

Besides setting document’s Author or Title, you can also set its default appearance when it becomes opened in a conforming PDF reader. E.g. indicate full-screen mode or whether the toolbars should be visible. See the section 12.2 Viewer Preferences for details. It’s worth mentioning that some readers don’t respect these settings, so don’t be surprised

The Apitron PDF Kit .NET component provides an easy access to document’s information, and its API can be used to change or add it when needed. See the code samples in the corresponding sections showing how to work with document information and set viewer preferences.

Setting PDF document information

This operation is easy and simple, see the code below:

public void SetDocumentInfomation()
    // open document
    using (Stream stream = File.Open("document.pdf", FileMode.Open))
        // create document object
        FixedDocument doc = new FixedDocument(stream);       
        // set document information
        doc.Author = "Apitron";
        doc.Title = "Sample document";
        doc.Subject = "Apitron PDF Kit API usage sample";
        doc.Keywords = "document information,c# sample,apitron pdf kit";               
        // save as incremental update

If you open this document in Adobe Reader, you’ll be able to see its new properties (click on File -> Properties and select Description tab)

Pic. 1 Setting PDF document properties

Pic. 1 Setting document properties

Setting PDF viewer preferences

The code below shows how to change viewer preferences:

public void SetPDFViewerPrerences()
    // open document
    using (Stream stream = File.Open("document.pdf", FileMode.Open))
        // create document object
        FixedDocument doc = new FixedDocument(stream);

        // set viewer and page preferences
        doc.ViewerPreferences.HideToolbar = true;
        doc.ViewerPreferences.DisplayDocTitle = true;       
        doc.PageMode = PageMode.FullScreen;
        doc.PageLayout = PageLayout.SinglePage;        
        // save as incremental update

When you run this sample and open the changed document in Acrobat Reader, it may warn you that document tries to go to full screen mode. It’s normal, and you can proceed and allow or disallow this behavior. It will also take into account the other settings, so there will be no toolbar visible and so on.


When it comes to setting the PDF information and viewer settings, you may rely on Apitron PDF Kit .NET component, it does its job flawlessly. If you are interested in more complex PDF manipulation scenarios, you can read our other posts or the free book which contains lots of useful information and ready to use samples. If you have questions regarding the API or PDF manipulation, contact us and our support will be happy to help you.

Downloadable version of this article can be found by the following link [PDF].

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