Annotations in PDF Documents

Oct 15, 2021
12 minutes to read

The PDF Document API supports the following annotation types:

Link Annotations

A hypertext link to a URI or a destination (a reference to a page with specific view parameters).

Markup Annotations

Annotations used to mark up document content. The following markups are available:

Caret
Rubber Stamp
Shape (circle, square)
File Attachment
Free Text (text box, callout, typewriter)
Ink
Path (line, polyline, polygon)

You can create and delete annotations, edit their content, flatten, add related comments and reviews.

The PdfPageFacade.Annotations property retrieves all page annotation properties. Use the PdfDocumentFacade.Pages property to access the PdfPageFacade class.

Create Annotations

Create Link Annotations

Call the PdfPageFacade.AddLinkAnnotation method to create a link annotation.

Create a Link to a URI

The code sample below creates an annotation linked to a URI string:

uri link

C#
VB.NET

using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
{
    // Load a document
    processor.LoadDocument("..\\..\\Document.pdf");

    // Access the first page properties
    PdfPageFacade page = processor.DocumentFacade.Pages[0];

    // Find the target phrase in the document
    string linkText = "Evaluation";
    PdfTextSearchResults linkSearchResults = processor.FindText(linkText);

    if (linkSearchResults.Status == PdfTextSearchStatus.Found)
    {
        PdfRectangle linkRectangle = linkSearchResults.Rectangles[0].BoundingRectangle;
        string linkUri = "https://community.devexpress.com/blogs/";

        // Add a link annotation to the found text
        PdfLinkAnnotationFacade uriAnnotation = page.AddLinkAnnotation(linkRectangle, linkUri);
        uriAnnotation.Name = "link1";
        uriAnnotation.HighlightMode = PdfAnnotationHighlightingMode.Push;
    }
    processor.SaveDocument("..\\..\\Result.pdf");
}

Using processor As New PdfDocumentProcessor()
  ' Load a document
  processor.LoadDocument("..\..\Document.pdf")

  ' Access the first page properties
  Dim page As PdfPageFacade = processor.DocumentFacade.Pages(0)

  ' Find the target phrase in the document
  Dim linkText As String = "Evaluation"
  Dim linkSearchResults As PdfTextSearchResults = processor.FindText(linkText)

  If linkSearchResults.Status = PdfTextSearchStatus.Found Then
    Dim linkRectangle As PdfRectangle = linkSearchResults.Rectangles(0).BoundingRectangle
    Dim linkUri As String = "https://community.devexpress.com/blogs/"

    ' Add a link annotation to the found text
    Dim uriAnnotation As PdfLinkAnnotationFacade = page.AddLinkAnnotation(linkRectangle, linkUri)
    uriAnnotation.Name = "link1"
    uriAnnotation.HighlightMode = PdfAnnotationHighlightingMode.Push
  End If
  processor.SaveDocument("..\..\Result.pdf")
End Using

Create a Link to a Destination

A destination includes the following view parameters:

The displayed document page
The location of the document window on this page
The magnification (zoom factor)

Call one of the following methods to create a destination:

View Parameters	Methods
Fit the page’s bounding box to the document window both horizontally and vertically.	PdfPageFacade.CreateFitBBoxDestination
Fit the page’s bounding box to the document window horizontally.	PdfPageFacade.CreateFitBBoxHorizontallyDestination
Fit the page’s bounding box to the document window vertically.	PdfPageFacade.CreateFitBBoxVerticallyDestination
Fit the entire page to the document window both horizontally and vertically (Zoom to Page Level view).	PdfPageFacade.CreateFitDestination
Fit the entire page to the document window horizontally.	PdfPageFacade.CreateFitHorizontallyDestination
Fit the entire page to the document window vertically.	PdfPageFacade.CreateFitVerticallyDestination
Display the specified page area in the document window.	PdfPageFacade.CreateFitRectangleDestination
Position the specified page coordinate at the top left document window corner, and specify the zoom factor.	PdfPageFacade.CreateXYZDestination

The code sample below creates a link annotation with a destination that displays the third page with the Zoom to Page Level view:

destination link

C#
VB.NET

using (PdfDocumentProcessor pdfDocumentProcessor = new PdfDocumentProcessor())
{
    // Load a document
    pdfDocumentProcessor.LoadDocument("Demo.pdf");

    // Access third page properties
    PdfPageFacade pageFacade = pdfDocumentProcessor.DocumentFacade.Pages[2];

    // Create a Fit destination that refers to the third page
    PdfFitDestination destination = pageFacade.CreateFitDestination();

    // Find a specific phrase
    string linkText = "JBIG2 images";
    PdfTextSearchResults linkSearchResults = pdfDocumentProcessor.FindText(linkText);

    // If the phrase is found, obtain its bounding rectangle
    if (linkSearchResults.Status == PdfTextSearchStatus.Found)
    {
        PdfRectangle linkRectangle = linkSearchResults.Rectangles[0].BoundingRectangle;

        // Access first page properties
        PdfPageFacade linkPageFacade =
           pdfDocumentProcessor.DocumentFacade.Pages[linkSearchResults.PageNumber -1];

        // Create a link annotation associated with the bounding rectangle
        // and destination
        PdfLinkAnnotationFacade linkAnnotation =
            linkPageFacade.AddLinkAnnotation(linkRectangle, destination);
        linkAnnotation.HighlightMode = PdfAnnotationHighlightingMode.Push;
    }
    // Save the result
    pdfDocumentProcessor.SaveDocument("out.pdf");
}

Using pdfDocumentProcessor As New PdfDocumentProcessor()
  ' Load a document
  pdfDocumentProcessor.LoadDocument("Demo.pdf")

  ' Access third page properties
  Dim pageFacade As PdfPageFacade = pdfDocumentProcessor.DocumentFacade.Pages(2)

  ' Create a Fit destination that refers to the third page
    Dim destination As PdfFitDestination = pageFacade.CreateFitDestination()

  ' Find a specific phrase
  Dim linkText As String = "JBIG2 images"
  Dim linkSearchResults As PdfTextSearchResults = pdfDocumentProcessor.FindText(linkText)

  ' If the phrase is found, obtain its bounding rectangle
  If linkSearchResults.Status = PdfTextSearchStatus.Found Then
    Dim linkRectangle As PdfRectangle = linkSearchResults.Rectangles(0).BoundingRectangle

    ' Access first page properties
    Dim linkPageFacade As PdfPageFacade = pdfDocumentProcessor.DocumentFacade.Pages(linkSearchResults.PageNumber -1)

    'Create a link annotation associated with the bounding rectangle
    ' and destination
    Dim linkAnnotation As PdfLinkAnnotationFacade =
       linkPageFacade.AddLinkAnnotation(linkRectangle, destination)
    linkAnnotation.HighlightMode = PdfAnnotationHighlightingMode.Push
  End If
  ' Save the result
  pdfDocumentProcessor.SaveDocument("out.pdf")
End Using

Create Markup Annotations

The table below lists available markup annotation types and API used to create these annotations:

Annotation	Class	Method
Text Markup	PdfTextMarkupAnnotationFacade	PdfPageFacade.AddTextMarkupAnnotation
Sticky Note	PdfTextAnnotationFacade	PdfPageFacade.AddTextAnnotation
Caret	PdfCaretAnnotationFacade	PdfPageFacade.AddCaretAnnotation
Rubber Stamp	PdfRubberStampAnnotationFacade	PdfPageFacade.AddRubberStampAnnotation
Circle	PdfCircleAnnotationFacade	PdfPageFacade.AddCircleAnnotation
Square	PdfSquareAnnotationFacade	PdfPageFacade.AddSquareAnnotation
File Attachment	PdfFileAttachmentAnnotationFacade	PdfPageFacade.AddFileAttachmentAnnotation
Free Text	PdfFreeTextAnnotationFacade	PdfPageFacade.AddFreeTextAnnotation
Ink	PdfInkAnnotationFacade	PdfPageFacade.AddInkAnnotation
Line	PdfLineAnnotationFacade	PdfPageFacade.AddLineAnnotation
Polyline	PdfPolyLineAnnotationFacade	PdfPageFacade.AddPolyLineAnnotation
Polygon	PdfPolygonAnnotationFacade	PdfPageFacade.AddPolygonAnnotation

The code sample below creates a rubber stamp, file attachment, free text, and a circle annotation:

markup annotations

C#
VB.NET

using DevExpress.Pdf;
using System;
using System.IO;

using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
{
    // Load a document
    processor.LoadDocument("..\\..\\Document.pdf");

    // Access the first page properties
    PdfPageFacade pageFacade = processor.DocumentFacade.Pages[0];

    // Define a rubber stamp rectangle
    PdfRectangle rubberStampRectangle = new PdfRectangle(663, 526, 763, 576);

    // Create a "Draft" rubber stamp annotation
    PdfRubberStampAnnotationFacade rubberStamp =
        pageFacade.AddRubberStampAnnotation(rubberStampRectangle,
        PdfRubberStampAnnotationIconName.Draft);
    rubberStamp.Author = "Jesse Faden";
    rubberStamp.Contents = "Made in PDF Document API";

    // Define a file attachment area
    PdfPoint attachmentPoint = new PdfPoint(52, 550);

    // Specify attachment data
    PdfFileAttachment attachment = new PdfFileAttachment()
    {
        CreationDate = DateTime.Now,
        Description = "This is my attached file",
        FileName = "MyAttach.txt",
        Data = File.ReadAllBytes("..\\..\\FileToAttach.txt")
    };

    // Create a file attachment annotation
    PdfFileAttachmentAnnotationFacade pdfFileAttachment =
        pageFacade.AddFileAttachmentAnnotation(attachmentPoint, attachment,
        PdfFileAttachmentAnnotationIconName.PaperClip);
    pdfFileAttachment.Author = "Nancy Skywalker";
    pdfFileAttachment.Contents = "Additional Content";

    // Specify a free text annotation area
    PdfRectangle freeTextRectangle = new PdfRectangle(14, 321, 145, 340);

    // Create a free text annotation in this area
    PdfFreeTextAnnotationFacade freeTextAnnotation =
       pageFacade.AddFreeTextAnnotation(freeTextRectangle, "Free Text Annotation");
    freeTextAnnotation.Author = "Rayn Anita W";

    // Add a callout line
    freeTextAnnotation.SetCallout(PdfAnnotationLineEndingStyle.OpenArrow, new PdfPoint(152,351));

    // Find the target phrase in the document
    string circleText = "dogfooded";
    PdfTextSearchResults searchResults = processor.FindText(circleText);

    if (searchResults.Status == PdfTextSearchStatus.Found)
    {
        // Define an area around the phrase to add an annotation
        PdfRectangle circleRectangle = searchResults.Rectangles[0].BoundingRectangle;

        // Create a circle annotation in this area
        PdfCircleAnnotationFacade circleAnnotation = pageFacade.AddCircleAnnotation(circleRectangle);
        circleAnnotation.Author = "Cardle Anita W";
        circleAnnotation.Contents = "It's better to say 'used' in this case";
    }

    // Save the result
    processor.SaveDocument("..\\..\\Result.pdf");
}

Imports DevExpress.Pdf
Imports System
Imports System.IO

Using processor As New PdfDocumentProcessor()
  ' Load a document
  processor.LoadDocument("..\..\Document.pdf")

  ' Access the first page properties
  Dim pageFacade As PdfPageFacade = processor.DocumentFacade.Pages(0)

  ' Define a rubber stamp rectangle
  Dim rubberStampRectangle As New PdfRectangle(663, 526, 763, 576)

  ' Create a "Draft" rubber stamp annotation
  Dim rubberStamp As PdfRubberStampAnnotationFacade =
     pageFacade.AddRubberStampAnnotation(rubberStampRectangle,
     PdfRubberStampAnnotationIconName.Draft)
  rubberStamp.Author = "Jesse Faden"
  rubberStamp.Contents = "Made in PDF Document API"

  ' Define a file attachment area
  Dim attachmentPoint As New PdfPoint(52, 550)

  ' Specify attachment data
  Dim attachment As New PdfFileAttachment() With 
  {
    .CreationDate = Date.Now,
    .Description = "This is my attached file",
    .FileName = "MyAttach.txt",
    .Data = File.ReadAllBytes("..\..\FileToAttach.txt")
  }

  ' Create a file attachment annotation
  Dim pdfFileAttachment As PdfFileAttachmentAnnotationFacade =
     pageFacade.AddFileAttachmentAnnotation(attachmentPoint, attachment,
      PdfFileAttachmentAnnotationIconName.PaperClip)
  pdfFileAttachment.Author = "Nancy Skywalker"
  pdfFileAttachment.Contents = "Additional Content"

  ' Specify a free text annotation area
  Dim freeTextRectangle As New PdfRectangle(14, 321, 145, 340)

  ' Create a free text annotation
  Dim freeTextAnnotation As PdfFreeTextAnnotationFacade =
     pageFacade.AddFreeTextAnnotation(freeTextRectangle, "Free Text Annotation")
  freeTextAnnotation.Author = "Rayn Anita W"

  ' Add a callout line
  freeTextAnnotation.SetCallout(PdfAnnotationLineEndingStyle.OpenArrow, New PdfPoint(152,351))

  ' Find the target phrase in the document
  Dim circleText As String = "dogfooded"
  Dim searchResults As PdfTextSearchResults = processor.FindText(circleText)

  If searchResults.Status = PdfTextSearchStatus.Found Then
    ' Define an area around the phrase to add an annotation
    Dim circleRectangle As PdfRectangle = searchResults.Rectangles(0).BoundingRectangle

    ' Create a circle annotation in this area
    Dim circleAnnotation As PdfCircleAnnotationFacade = pageFacade.AddCircleAnnotation(circleRectangle)
    circleAnnotation.Author = "Cardle Anita W"
    circleAnnotation.Contents = "It's better to say 'used' in this case"
  End If

  ' Save the result
  processor.SaveDocument("..\..\Result.pdf")
End Using

Edit Annotations

The PdfPageFacade.Annotations property returns all page annotation properties. You can filter annotation properties, cast them to the corresponding class, and use class properties to modify annotation parameters.

The code sample below changes annotations created in the previous example, so they appear as follows:

markup edited

C#
VB.NET

using DevExpress.Pdf;
using System.Linq;

using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
{
    // Load a document
    processor.LoadDocument("..\\..\\Result.pdf");

    // Access the first page properties
    PdfPageFacade pageFacade = processor.DocumentFacade.Pages[0];

    // Obtain all free text annotations
    var freeTextAnnotations = pageFacade.Annotations.Where
        (annotation => annotation.Type == PdfAnnotationType.FreeText);
    foreach (PdfFreeTextAnnotationFacade freeText in freeTextAnnotations) 
    { 
        // Change border parameters and text justification
        freeText.InteriorColor = new PdfRGBColor(0.36, 0.54, 0.66);
        freeText.BorderWidth = 0.5;
        freeText.TextJustification = PdfTextJustification.Centered;
    }

    // Retrieve all circle annotations
    var circleAnnotations = pageFacade.Annotations.Where
        (annotation => annotation.Type == PdfAnnotationType.Circle);
    foreach (PdfCircleAnnotationFacade pdfCircle in circleAnnotations)
    { 
        // Change border style and color
        pdfCircle.BorderStyle = PdfBorderStyle.Dash; 
        pdfCircle.Color = new PdfRGBColor(0.52, 0.87, 0.01);
    }

    // Get all rubber stamps 
    var rubberStampAnnotations = pageFacade.Annotations.Where
        (annotation => annotation.Type == PdfAnnotationType.RubberStamp);
    foreach (PdfRubberStampAnnotationFacade pdfRubberStamp in rubberStampAnnotations)
    {
        // Generate a stamp from another document’s page
        pdfRubberStamp.SetCustomIcon("..\\..\\Demo.pdf", 4);
    }

    // Obtain all file attachments
    var fileAttachments = pageFacade.Annotations.Where
        (annotation => annotation.Type == PdfAnnotationType.FileAttachment);
    foreach (PdfFileAttachmentAnnotationFacade fileAttachment in fileAttachments) 
    {
        // Change the icon and its color
        fileAttachment.Color = new PdfRGBColor(0.83, 0.13, 0.18);
        fileAttachment.IconName = PdfFileAttachmentAnnotationIconName.Tag;
    }
        // Save the result
        processor.SaveDocument("..\\..\\Result_1.pdf");
}

Imports DevExpress.Pdf
Imports System.Linq

Using processor As New PdfDocumentProcessor()
  ' Load a document
  processor.LoadDocument("..\..\Result.pdf")

  ' Access the first page properties
  Dim pageFacade As PdfPageFacade = processor.DocumentFacade.Pages(0)

  ' Obtain all free text annotations
  Dim freeTextAnnotations = pageFacade.Annotations.Where
      (Function(annotation) annotation.Type = PdfAnnotationType.FreeText)
  For Each freeText As PdfFreeTextAnnotationFacade In freeTextAnnotations

    ' Change border parameters and text justification
    freeText.InteriorColor = New PdfRGBColor(0.36, 0.54, 0.66)
    freeText.BorderWidth = 0.5
    freeText.TextJustification = PdfTextJustification.Centered
  Next freeText

  ' Retrieve all circle annotations
  Dim circleAnnotations = pageFacade.Annotations.Where
      (Function(annotation) annotation.Type = PdfAnnotationType.Circle)
  For Each pdfCircle As PdfCircleAnnotationFacade In circleAnnotations

    ' Change border style and color
    pdfCircle.BorderStyle = PdfBorderStyle.Dash
    pdfCircle.Color = New PdfRGBColor(0.52, 0.87, 0.01)
  Next pdfCircle

  ' Get all rubber stamps 
  Dim rubberStampAnnotations = pageFacade.Annotations.Where
      (Function(annotation) annotation.Type = PdfAnnotationType.RubberStamp)
  For Each pdfRubberStamp As PdfRubberStampAnnotationFacade In rubberStampAnnotations

    ' Generate a stamp from another document’s page
    pdfRubberStamp.SetCustomIcon("..\..\Demo.pdf", 4)
  Next pdfRubberStamp

  ' Obtain all file attachments
  Dim fileAttachments = pageFacade.Annotations.Where
      (Function(annotation) annotation.Type = PdfAnnotationType.FileAttachment)
  For Each fileAttachment As PdfFileAttachmentAnnotationFacade In fileAttachments

    ' Change the icon and its color
    fileAttachment.Color = New PdfRGBColor(0.83, 0.13, 0.18)
    fileAttachment.IconName = PdfFileAttachmentAnnotationIconName.Tag
  Next fileAttachment

    ' Save the result
    processor.SaveDocument("..\..\Result_1.pdf")
End Using

Add Comments to Annotations

Use API from the table below to add comments to markup annotations:

API	Description
PdfMarkupAnnotationFacade.AddReply	Adds a comment to the annotation. This method returns the PdfMarkupAnnotationComment object. Use this class’ members to change the reply’s author, subject and text.
PdfMarkupAnnotationFacade.Replies	Obtains all annotation comments.
PdfMarkupAnnotationComment.AddReply	Creates a nested comment.
PdfMarkupAnnotationComment.Replies	Gets all nested comments added to the comment.
PdfMarkupAnnotationComment.AddReview	Add a review to the comment. Use the PdfMarkupAnnotationFacade.Reviews property to get all reviews.

The code sample below adds two nested comments to all sticky notes (the document in opened in WinForms PDF Viewer):

added comments

C#
VB.NET

using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
{
    // Load a document
    processor.LoadDocument("..\\..\\Document.pdf");

    // Access the first page properties
    PdfPageFacade pageFacade = processor.DocumentFacade.Pages[0];

    // Retrieve all text annotations
    var stickyNotes = pageFacade.Annotations.Where
            (annotation => annotation.Type == PdfAnnotationType.Text);
    foreach (PdfTextAnnotationFacade stickyNote in stickyNotes)
    {
        // Add comments
        AddAnnotationComments(stickyNote);
    }

    // Save the result
    processor.SaveDocument("..\\..\\Result.pdf");
}

private static void AddAnnotationComments(PdfMarkupAnnotationFacade annotation)
{
    PdfMarkupAnnotationComment comment =
       annotation.AddReply("Reviewer", "Done");
    comment.Subject = "Proofread";

    PdfMarkupAnnotationComment nestedComment =
       comment.AddReply(annotation.Author, "Thanks");
    nestedComment.Subject = "Reviewed";
}

Using processor As New PdfDocumentProcessor()
  ' Load a document
  processor.LoadDocument("..\..\Document.pdf")

  ' Access the first page properties
  Dim pageFacade As PdfPageFacade = processor.DocumentFacade.Pages(0)

  ' Retrieve all text annotations
  Dim stickyNotes = pageFacade.Annotations.Where
    (Function(annotation) annotation.Type = PdfAnnotationType.Text)
  For Each stickyNote As PdfTextAnnotationFacade In stickyNotes
    ' Add comments
    AddAnnotationComments(stickyNote)
  Next stickyNote

  ' Save the result
  processor.SaveDocument("..\..\Result.pdf")
End Using

private static void AddAnnotationComments(PdfMarkupAnnotationFacade annotation)
  Dim comment As PdfMarkupAnnotationComment = annotation.AddReply("Reviewer", "Done")
  comment.Subject = "Proofread"

  Dim nestedComment As PdfMarkupAnnotationComment = comment.AddReply(annotation.Author, "Thanks")
  nestedComment.Subject = "Reviewed"

Add Reviews to Annotations

Call the PdfMarkupAnnotationFacade.AddReview method to add a review to the markup annotation. The PdfMarkupAnnotationFacade.Reviews property obtains all annotation reviews.

To remove all reviews, call the PdfMarkupAnnotationFacade.ClearReviews() method.

The code sample below adds a review to the annotations from a specific author (the document is opened in the WinForms PDF Viewer):

added reviews

C#
VB.NET

using DevExpress.Pdf;

using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
{
    // Load a document
    processor.LoadDocument("..\\..\\Document.pdf");

    // Access the first page properties
    PdfPageFacade pageFacade = processor.DocumentFacade.Pages[0];

    foreach(PdfMarkupAnnotationFacade markupAnnotation in pageFacade.Annotations)
    {

        // Check the annotation author
        if (markupAnnotation.Author == "Brian Zetc") 
        {

          // Add a review to the annotation
            markupAnnotation.AddReview("Cardle Anita W", PdfAnnotationReviewStatus.Accepted);
        }
    }
    // Save the result
    processor.SaveDocument("..\\..\\Result.pdf");
}

Imports DevExpress.Pdf

Using processor As New PdfDocumentProcessor()
  ' Load a document
  processor.LoadDocument("..\..\Document.pdf")

  ' Access the first page properties
  Dim pageFacade As PdfPageFacade = processor.DocumentFacade.Pages(0)

  For Each markupAnnotation As PdfMarkupAnnotationFacade In pageFacade.Annotations

    ' Check the annotation author
    If markupAnnotation.Author = "Brian Zetc" Then

      ' Add a review to the annotation
      markupAnnotation.AddReview("Cardle Anita W", PdfAnnotationReviewStatus.Accepted)
    End If
  Next markupAnnotation
  ' Save the result
  processor.SaveDocument("..\..\Result.pdf")
End Using

Flatten Annotations

Call one of the following methods to flatten an annotation:

Method	Description
PdfDocumentFacade.FlattenAnnotations	Flattens document annotations.
PdfPageFacade.FlattenAnnotations	Flattens annotations of a specific page.
PdfAnnotationFacade.Flatten()	Flattens a specific annotation.

The code sample below flattens all text annotations in the document:

C#
VB.NET

using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
{
  // Load a document:
  processor.LoadDocument("..\\..\\Document.pdf");

  // Flatten all text annotations:
  PdfDocumentFacade documentFacade = processor.DocumentFacade;
  documentFacade.FlattenAnnotations(PdfAnnotationType.Text);

  // Save the result:
  processor.SaveDocument("..\\..\\Result.pdf");
}

Using processor As New PdfDocumentProcessor()
  ' Load a document:
  processor.LoadDocument("..\..\Document.pdf")

  ' Flatten all text annotations:
  Dim documentFacade As PdfDocumentFacade = processor.DocumentFacade
  documentFacade.FlattenAnnotations(PdfAnnotationType.Text)

  ' Save the result:
  processor.SaveDocument("..\..\Result.pdf")
End Using

Remove Annotations

Call the PdfAnnotationFacade.Remove() method to remove an annotation.

The code sample below removes all annotations from a specific author:

C#
VB.NET

using DevExpress.Pdf;
using System.Linq;

using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
{
    // Load a document
    processor.LoadDocument("..\\..\\Document.pdf");

    // Access the first page properties
    PdfPageFacade pageFacade = processor.DocumentFacade.Pages[0];

    // Retrieve all markup annotations
    var markups = pageFacade.Annotations.Where
            (annotation => annotation.Type != PdfAnnotationType.Link).ToList();
    foreach(PdfMarkupAnnotationFacade markupAnnotation in markups)
    {
        // Check the annotation author
        if (markupAnnotation.Author == "Brian Zetc")
        {
            // Remove the annotation
            markupAnnotation.Remove();
        }
    }
    // Save the result
    processor.SaveDocument("..\\..\\Result.pdf");
}

Imports DevExpress.Pdf
Imports System.Linq

Using processor As New PdfDocumentProcessor()
  ' Load a document
  processor.LoadDocument("..\..\Document.pdf")

  ' Access the first page properties
  Dim pageFacade As PdfPageFacade = processor.DocumentFacade.Pages(0)

  ' Retrieve all markup annotations
  Dim markups = pageFacade.Annotations.Where
    (Function(annotation) annotation.Type <> PdfAnnotationType.Link).ToList()
  For Each markupAnnotation As PdfMarkupAnnotationFacade In markups

    ' Check the annotation author
    If markupAnnotation.Author = "Brian Zetc" Then

      ' Remove the annotation
      markupAnnotation.Remove()
    End If
  Next markupAnnotation

  ' Save the result
  processor.SaveDocument("..\..\Result.pdf")
End Using

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Controls and Extensions

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Common Tools

Controls

Tools

Controls and Extensions

Tools

Maintenance Mode

Create Annotations

Create Link Annotations

Create a Link to a URI

Create a Link to a Destination

Create Markup Annotations

Edit Annotations

Add Comments to Annotations

Add Reviews to Annotations

Flatten Annotations

Remove Annotations