PM> Install-Package Spire.PDF

using Spire.Pdf;
using Spire.Pdf.Actions;
using Spire.Pdf.Annotations;
using Spire.Pdf.General;
using Spire.Pdf.Graphics;
using System.Drawing;

namespace AddNavigationButtonPDF
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create an instance of PdfDocument
            PdfDocument pdf = new PdfDocument();

            // Load a PDF file
            pdf.LoadFromFile("Sample.pdf");

            // Create a PdfDestination instance and set the destination
            PdfDestination destination = new PdfDestination(pdf.Pages[1]);
            destination.Location = new PointF(0, 0);
            destination.Mode = PdfDestinationMode.Location;
            destination.Zoom = 0.8f;

            // Create a PdfGoToAction based on the destination
            PdfGoToAction action = new PdfGoToAction(destination);

            // Create a rectangle and draw it on the first page
            RectangleF rect = new RectangleF(70, pdf.PageSettings.Size.Height - 120, 140, 20);
            pdf.Pages[0].Canvas.DrawRectangle(PdfBrushes.LightGray, rect);
            // Draw cue words on the rectangle
            PdfFont font = new PdfFont(PdfFontFamily.TimesRoman, 14);
            PdfStringFormat stringFormat = new PdfStringFormat(PdfTextAlignment.Center);
            pdf.Pages[0].Canvas.DrawString("To Page 2", font, PdfBrushes.Green, rect, stringFormat);

            // Create a PdfActionAnnotation instance based on the rectangle and the action
            PdfActionAnnotation actionAnnotation = new PdfActionAnnotation(rect, action);

            // Add the action annotation to the first page
            pdf.Pages[0].Annotations.Add(actionAnnotation);

            // Save the document
            pdf.SaveToFile("output/NavigationButton.pdf");
            pdf.Close();
        }
    }
}

using Spire.Pdf;
using Spire.Pdf.Actions;
using Spire.Pdf.Annotations;
using Spire.Pdf.Graphics;
using System.Drawing;

namespace AddFileLaunchActionPDF
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create an instance of PdfDocument
            PdfDocument pdf = new PdfDocument();

            // Load a PDF file
            pdf.LoadFromFile("Sample.pdf");

            // Get the first page
            PdfPageBase page = pdf.Pages[0];

            // Draw a rectangle on the page
            RectangleF rect = new RectangleF(50, 50, 180, 20);
            page.Canvas.DrawRectangle(PdfBrushes.LightGray, rect);
            // Darw the cue words in the rectangle
            PdfFont font = new PdfFont(PdfFontFamily.TimesRoman, 14);
            PdfStringFormat stringFormat = new PdfStringFormat(PdfTextAlignment.Center);
            pdf.Pages[0].Canvas.DrawString("Click to launch Sample2", font, PdfBrushes.Green, rect, stringFormat);

            // Create a PdfLaunchAction instance
            PdfLaunchAction action = new PdfLaunchAction("C:/Sample2.pdf", PdfFilePathType.Absolute);
            // Set the launch mode to open in new window
            action.IsNewWindow = true;

            // Create a PdfActionAnnotation instance based on the rectangle and the launch action
            PdfActionAnnotation actionAnnotation = new PdfActionAnnotation(rect, action);

            // Add the action annotation to the first page
            page.Annotations.Add(actionAnnotation);

            // Save the document
            pdf.SaveToFile("output/LaunchAction.pdf");
            pdf.Close();
        }
    }
}

using Spire.Pdf;
using Spire.Pdf.Actions;
using Spire.Pdf.Annotations;
using Spire.Pdf.Graphics;
using Spire.Pdf.General;
using System.Drawing;

namespace AddSoundActionPDF
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create an instance of PdfDocument
            PdfDocument pdf = new PdfDocument();

            // Load a PDF file
            pdf.LoadFromFile("Sample.pdf");

            // Get the first page
            PdfPageBase page = pdf.Pages[0];

            // Darw the cue image on the page
            PdfImage image = PdfImage.FromFile("Sound.png");
            page.Canvas.DrawImage(image, new PointF(30, 30));

            // Create a PdfSoundAction instance and set its property
            PdfSoundAction action = new PdfSoundAction("Wave.wav");
            // Set the sound parameters
            action.Sound.Bits = 16;
            action.Sound.Channels = PdfSoundChannels.Stereo;
            action.Sound.Encoding = PdfSoundEncoding.Signed;
            action.Sound.Rate = 44100;
            // Set the play options
            action.Volume = 0;
            action.Repeat = true;
            action.Mix = true;
            action.Synchronous = true;

            // Create a PdfActionAnnotation instance using the sound action at the location of the cue image
            RectangleF rect = new RectangleF(30, 30, image.Width, image.Height);
            PdfActionAnnotation actionAnnotation = new PdfActionAnnotation(rect, action);

            // Add the action annotation to the first page
            page.Annotations.Add(actionAnnotation);

            // Set the sound action to play after the document is opened
            pdf.AfterOpenAction = action;

            // Save the document
            pdf.SaveToFile("output/SoundAction.pdf");
            pdf.Close();
        }
    }
}

using Spire.Pdf;
using Spire.Pdf.Actions;
using Spire.Pdf.Annotations;
using Spire.Pdf.Graphics;
using System.Drawing;

namespace AddSoundActionPDF
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create an instance of PdfDocument
            PdfDocument pdf = new PdfDocument();

            // Load a PDF file
            pdf.LoadFromFile("Sample.pdf");

            // Get the first page
            PdfPageBase page = pdf.Pages[0];

            // Draw a rectangle on the page
            RectangleF rect = new RectangleF(30, 30, 120, 20);
            page.Canvas.DrawRectangle(PdfBrushes.LightGray, rect);
            // Draw the cue words in the rectangle
            PdfFont font = new PdfFont(PdfFontFamily.TimesRoman, 14);
            PdfStringFormat stringFormat = new PdfStringFormat(PdfTextAlignment.Center);
            page.Canvas.DrawString("Go to Google Search", font, PdfBrushes.LightSkyBlue, rect);

            // Create a PdfUriAction instance and set its property
            PdfUriAction action = new PdfUriAction();
            action.Uri = "https://www.google.com/";

            // Create a PdfActionAnnotation instance using the web link action and the rectangle
            PdfActionAnnotation actionAnnotation = new PdfActionAnnotation(rect, action);

            // Add the action annotation to the first page
            page.Annotations.Add(actionAnnotation);

            // Save the document
            pdf.SaveToFile("output/WebLinkAction.pdf");
            pdf.Close();
        }
    }
}

using Spire.Pdf;
using Spire.Pdf.Actions;

namespace AddJavaScriptActionPDF
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create a PdfDocument instance
            PdfDocument pdf = new PdfDocument();

            // Load a PDF file
            pdf.LoadFromFile("Sample.pdf");

            // Define JavaScript code
            var jsCode =
            "app.alert({" +
            "    cMsg: 'Welcome to the article about the Evolution and Advantages of LCD Screens!\\n\\nThis article explores the history and benefits of LCD technology, including its impact on visual experiences across various devices.', " +
            "    nIcon: 3, " +
            "    cTitle: 'Document Introduction'" +
            "});";

            // Create a PdfJavaScriptAction instance using the JavaScript code
            PdfJavaScriptAction action = new PdfJavaScriptAction(jsCode);

            // Set the action to be executed when the PDF document is launched
            pdf.AfterOpenAction = action;

            // Save the document
            pdf.SaveToFile("output/PDFJavaScriptAction.pdf");
            pdf.Close();
        }
    }
}