Set Viewer Preference of PDF

Set Viewer Preference of an existing PDF File

ViewerPreference class represents display modes of PDF files; for example, positioning the document window in the center of the screen, hiding viewer application’s menu bar etc.

ChangeViewerPreference method in PdfContentEditor class allows you to change the viewer preference. In order to do that, you need to create an object of PdfContentEditor class and bind the input PDF file using BindPdf method.

Ater that, you can call ChangeViewerPreference method to set any preference. Finally, you have to save the updated PDF file using Save method. The following code snippet shows you how to change viewer preference in an existing PDF file.

For example, we specify the parameter CenterWindow with which we center the window, after remove the top toolbar with HideMenubar and with PageModeUseNone open full-screen mode.

.NET Core 3.1

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET

public static void SetViewerPreference()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();

    // Open document
    using (var document = new Aspose.Pdf.Document(dataDir + "Sample.pdf"))
    {
        // Instantiate PdfContentEditor object
        var editor = new Aspose.Pdf.Facades.PdfContentEditor(document);

        // Change Viewer Preferences
        editor.ChangeViewerPreference(Aspose.Pdf.Facades.ViewerPreference.CenterWindow);
        editor.ChangeViewerPreference(Aspose.Pdf.Facades.ViewerPreference.HideMenubar);
        editor.ChangeViewerPreference(Aspose.Pdf.Facades.ViewerPreference.PageModeFullScreen);

        // Saves the result PDF to file
        editor.Save(dataDir + "PdfContentEditorDemo_SetViewerPreference.pdf");
    }
}

.NET 8

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET

public static void SetViewerPreference()
{
    // The path to the documents directory
    string dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();
    
    // Open document
    using var document = new Aspose.Pdf.Document(dataDir + "Sample.pdf");

    // Instantiate PdfContentEditor object
    var editor = new Aspose.Pdf.Facades.PdfContentEditor(document);

    // Change Viewer Preferences
    editor.ChangeViewerPreference(Aspose.Pdf.Facades.ViewerPreference.CenterWindow);
    editor.ChangeViewerPreference(Aspose.Pdf.Facades.ViewerPreference.HideMenubar);
    editor.ChangeViewerPreference(Aspose.Pdf.Facades.ViewerPreference.PageModeFullScreen);

    // Saves the result PDF to file
    editor.Save(dataDir + "PdfContentEditorDemo_SetViewerPreference.pdf");
}