Introduction

public static void GetCharactersAndFonts()
{
  Console.WriteLine( "=== ANALYZE CHARACTERS AND FONTS ===" );
  var fileName = "Two Page Text Only - from libre office.pdf";

  // Loads a document.
  using( var pdfDoc = PdfDocument.Load( TextsSample.TextsSampleResourcesDirectory + $"{fileName}" ) )
  {
    var outputFileName = "GetCharactersAndFonts.pdf";
    var outputPath = TextsSample.TextsSampleOutputDirectory + outputFileName;

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

      // Adds a title.
      var titleTextStyle = TextStyle.WithFont( pdfoutput.Fonts.GetStandardFont( StandardFontType.Helvetica ), 15d );
      page.AddParagraph( "Get Characters and Fonts", titleTextStyle, new ParagraphStyle( ParagraphHorizontalAlignment.Center ) );

      // Adds red Courier text at a specific Y position.
      var redTextStyle = TextStyle.WithFontAndColor( pdfoutput.Fonts.GetStandardFont( StandardFontType.Courier ), 12d, Brushes.Red );
      page.AddParagraph( $"Printing characters and fonts for 1st page of: {fileName}", 60, redTextStyle );

      // Gets the Words from the first Page of loaded document.
      var words = pdfDoc.Pages[ 0 ].Words;

      // Groups Words by their Font's Name.
      var wordsByFont = words.GroupBy( w => w.TextStyle.Font?.Name ?? "No font" );

      var textStyle = TextStyle.WithFont( pdfoutput.Fonts.GetStandardFont( StandardFontType.Courier ), 12d );
      var counter = 0;
      foreach( var group in wordsByFont )
      {
        // Adds text for the Font at a specific Y position.
        page.AddParagraph( $"Font Name: {group.Key}", 105 + ( counter * 70 ), textStyle );
        page.AddParagraph( $"  Number of words: {group.Count()}", 120 + ( counter * 70 ), textStyle );

        var firstWord = group.First();

        // Adds text for the Font size at a specific Y position.
        page.AddParagraph( $"  Font size: {firstWord.TextStyle.FontSize:F1} points", 135 + ( counter * 70 ), textStyle );

        // Adds text for example of words using this font at a specific Y position.
        page.AddParagraph( $"  Example of words: {string.Join( ", ", group.Take( 3 ).Select( w => $"'{w.Text}'" ) )}", 150 + ( counter * 70 ), textStyle );
        counter++;
      }

      // Gives a detailed analysis of a specific Word.         
      if( words.Count > 0 )
      {
        // Gets the first Word of the loaded document.
        var exampleWord = words[ 0 ];

        // Adds text detailing which Word is analysed and gives its character count, all at a specific Y position.
        page.AddParagraph( $"Detailed analysis of word '{exampleWord.Text}':", 260, redTextStyle );
        page.AddParagraph( $"  Number of characters: {exampleWord.Characters.Count}", 275, textStyle );

        counter = 0;
        for( int i = 0; i < exampleWord.Characters.Count; i++ )
        {
          var character = exampleWord.Characters[ i ];

          // Adds text to detail all the Word's characters at a specific Y position.
          page.AddParagraph( $"    Character {i + 1}: '{character.Value}'; Location: ({character.Bounds.Left:F0}, {character.Bounds.Top:F0}); Width: {character.Bounds.Width:F2} points",
                             290 + ( counter * 15 ),
                             textStyle );
          counter++;
        }

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