public static void SetPageSettings()
{
  Console.WriteLine( "=== SET PAGE SETTINGS ===" );

  var outputFileName = "SetPageSettings.pdf";
  var outputPath = PagesSample.PagesSampleOutputDirectory + outputFileName;

  // Creates a PdfDocument.
  using( var pdfoutput = PdfDocument.Create( outputPath ) )
  {
    // Gets the first Page of the document.
    var firstPage = pdfoutput.Pages.First();

    // Sets the first Page settings to be an A3 format.
    firstPage.PageSettings = PageSettings.Predefined[ PageFormatType.A3 ];

    // Adds a title.
    var titleStyle = TextStyle.WithFont( pdfoutput.Fonts.GetStandardFont( StandardFontType.Helvetica ), 15d );
    firstPage.AddParagraph( "Set Page Settings", titleStyle, new ParagraphStyle( ParagraphHorizontalAlignment.Center ) );

    // Adds Lorem Ipsum text on the first Page.
    var paragraphLayout = firstPage.AddParagraph( PagesSample.LoremIpsumText, 100, paragraphStyle: new ParagraphStyle( ParagraphHorizontalAlignment.Justify ) );

    // Adds a paragraph at the specific Y position.
    firstPage.AddParagraph( "_____________________________________________________________", 365 );
    firstPage.AddParagraph( "This PDF has the following PageSettings properties:\n\n", 382 );

    // Gets the PageSettings for the first Page.
    var pageSettings = firstPage.PageSettings;

    // Adds text representing the firstPage's PageSettings.
    firstPage.AddParagraph( $"FormatType: {pageSettings.FormatType}", 415 );
    firstPage.AddParagraph( $"Orientation: {pageSettings.Orientation}", 430 );
    firstPage.AddParagraph( $"Width: {pageSettings.Width:F0} points", 445 );
    firstPage.AddParagraph( $"Width: {pageSettings.Height:F0} points", 460 );
    var margins = pageSettings.Margins;
    firstPage.AddParagraph( $"Margins:", 475 );
    firstPage.AddParagraph( $"-  Left: {margins.Left:F0} points", 490 );
    firstPage.AddParagraph( $"-  Top: {margins.Top:F0} points", 505 );
    firstPage.AddParagraph( $"-  Right: {margins.Right:F0} points", 520 );
    firstPage.AddParagraph( $"-  Bottom: {margins.Bottom:F0} points", 535 );

    // Sets a PdfDocument.PageSettings so that every new Page added will use these settings.
    pdfoutput.PageSettings = PageSettings.Default.SetWidth( 400 ).SetHeight( 300 );

    // Adds a second Page.
    var secondPage = pdfoutput.Pages.Add();

    // Adds text on the second Page.
    paragraphLayout = secondPage.AddParagraph( "Text for second page." );

    // Gets the PageSettings for the second Page.
    pageSettings = secondPage.PageSettings;

    // Adds a paragraph at the specific Y position.
    secondPage.AddParagraph( "_____________________________________________________________", 45 );
    secondPage.AddParagraph( "This PDF has the following PageSettings properties:", 60 );

    // Adds text representing the secondPage's PageSettings.
    secondPage.AddParagraph( $"FormatType: {pageSettings.FormatType}", 105 );
    secondPage.AddParagraph( $"Orientation: {pageSettings.Orientation}", 120 );
    secondPage.AddParagraph( $"Width: {pageSettings.Width:F0} points", 135 );
    secondPage.AddParagraph( $"Width: {pageSettings.Height:F0} points", 150 );
    margins = pageSettings.Margins;
    secondPage.AddParagraph( $"Margins:", 165 );
    secondPage.AddParagraph( $"-  Left: {margins.Left:F0} points", 180 );
    secondPage.AddParagraph( $"-  Top: {margins.Top:F0} points", 195 );
    secondPage.AddParagraph( $"-  Right: {margins.Right:F0} points", 210 );
    secondPage.AddParagraph( $"-  Bottom: {margins.Bottom:F0} points", 225 );

    // Saves the output document.
    pdfoutput.Save();
    Console.WriteLine( $"Info exported to path: {outputFileName}" );
  }
}

public static void AddMultiplePageSettings()
{
  Console.WriteLine( "=== ADD MULTIPLE PAGE SETTINGS ===" );

  string outputFileName = "AddMultiplePageSettings.pdf";
  string outputPath = PagesSample.PagesSampleOutputDirectory + outputFileName;

  Console.WriteLine( $"Creating PDF: {outputFileName}" );
  Console.WriteLine( $"Output path: {outputPath}" );

  using( var pdfDoc = PdfDocument.Create( outputPath ) )
  {
    // Gets the first Page of the document.
    var page = pdfDoc.Pages.First();

    // Adds a title.
    var titleStyle = TextStyle.WithFont( pdfDoc.Fonts.GetStandardFont( StandardFontType.Helvetica ), 15d );
    page.AddParagraph( "Add Multiple Page Settings", titleStyle, new ParagraphStyle( ParagraphHorizontalAlignment.Center ) );

    // Page 0: Default settings.
    var page0 = pdfDoc.Pages[ 0 ];
    // Add Text for PageSettings of Page0.
    PagesSample.ShowPageSettingsData( page0, "Default Settings" );

    // Page 1: Letter Portrait with custom margins.
    var settings1 = PageSettings.Predefined[ PageFormatType.Letter ]
                                .SetMargins( new Margins( 80, 60, 80, 60 ) );
    var page1 = pdfDoc.Pages.Add();
    page1.PageSettings = settings1;

    // Adds text representing the PageSettings of Page1.
    PagesSample.ShowPageSettingsData( page1, "Letter Portrait with custom Margins" );

    // Page 2: Letter Landscape with custom Margins.
    var settings2 = PageSettings.Predefined[ PageFormatType.Letter ]
                                .SetMargins( new Margins( 80, 60, 80, 60 ) )
                                .SetOrientation( PageOrientation.Landscape );
    var page2 = pdfDoc.Pages.Add();
    page2.PageSettings = settings2;

    // Adds text representing the PageSettings of Page2.
    PagesSample.ShowPageSettingsData( page2, "Letter Landscape with Custom Margins" );

    // Page 3: A4 Portrait with custom margins.
    var settings3 = PageSettings.Predefined[ PageFormatType.A4 ]
                                .SetMargins( new Margins( 80, 60, 80, 60 ) );
    var page3 = pdfDoc.Pages.Add();
    page3.PageSettings = settings3;

    // Adds text representing the PageSettings of Page3.
    PagesSample.ShowPageSettingsData( page3, "A4 Portrait with Custom Margins" );

    // Page 4: A4 Landscape with custom margins.
    var settings4 = PageSettings.Predefined[ PageFormatType.A4 ]
                                .SetOrientation( PageOrientation.Landscape )
                                .SetMargins( new Margins( 80, 60, 80, 60 ) );
    var page4 = pdfDoc.Pages.Add();
    page4.PageSettings = settings4;

    // Adds text representing the PageSettings of Page4.
    PagesSample.ShowPageSettingsData( page4, "A4 Landscape with Custom Margins" );

    // Page 5: A3 with custom margins.
    var settings5 = PageSettings.Predefined[ PageFormatType.A3 ]
                                .SetMargins( new Margins( 200, 200, 50, 40 ) );
    var page5 = pdfDoc.Pages.Add();
    page5.PageSettings = settings5;

    // Adds text representing the PageSettings of Page5.
    PagesSample.ShowPageSettingsData( page5, "A3 with Custom Margins" );

    // Page 6: Custom Size and Margins.
    var settings6 = PageSettings.Default
                                .SetSize( 800, 600 )
                                .SetMargins( new Margins( 80, 60, 80, 60 ) );
    var page6 = pdfDoc.Pages.Add();
    page6.PageSettings = settings6;

    // Adds text representing the PageSettings of Page6.
    PagesSample.ShowPageSettingsData( page6, "Custom Size and Margins" );

    // Page 7: A4 Portrait with small margins.
    var settings7 = PageSettings.Predefined[ PageFormatType.A4 ]
                                .SetMargins( new Margins( 20, 15, 20, 15 ) );
    var page7 = pdfDoc.Pages.Add();
    page7.PageSettings = settings7;

    // Adds text representing the PageSettings of Page7.
    PagesSample.ShowPageSettingsData( page7, "A4 with small Margins" );
    
    // Saves the output document.
    pdfDoc.Save();
    Console.WriteLine( $"  PDF successfully created and saved to: {outputPath}" );
  }
}

private static void ShowPageSettingsData( Page page, string title )
{
  var pageSettings = page.PageSettings;

  // Adds Paragraph text at the specific Y position.
  page.AddParagraph( $"Page {page.Id}: {title}", 60 );
  page.AddParagraph( $"Width: {pageSettings.Width:F0} points", 90 );
  page.AddParagraph( $"Height: {pageSettings.Height:F0} points", 105 );
  page.AddParagraph( $"Margins: Left: {pageSettings.Margins.Left:F0}, Top: {pageSettings.Margins.Top:F0}, Right: {pageSettings.Margins.Right:F0}, Bottom: {pageSettings.Margins.Bottom:F0}", 120 );
}