About GroupDocs.Annotation for .NET

Annotate text or images in documents.

GroupDocs.Annotation for .NET provides a simple API that allows you to work with different types of annotations, which include: Text, Polyline, Area, Underline, Point, Watermark, Arrow, Ellipse, Text Replacement, Distance, Text Field, Resource Redaction etc. It also supports most popular documents formats such as: PDF, HTML, Microsoft Office Word, Excel spreadsheets, PowerPoint presentations, Visio, Outlook emails, images, metafiles, CAD drawing and various other formats.

Supported File Formats

Microsoft Office Formats

  • Microsoft Word: DOC, DOCX, DOCM, DOT, DOTX, RTF
  • Microsoft Excel: XLS, XLSX, XLSM, XLSB
  • Microsoft PowerPoint: PPT, PPTX, PPS, PPSX, POTM, POTX, PPSM, PPTM, WMF, EMF
  • Microsoft Outlook: EML, EMLX, MSG
  • Microsoft Visio: VSS, VST, VSD, VSDX, VSX

Other Formats

  • Portable: PDF (PDF/A-1a, PDF/A-1b, PDF/A-2a)
  • OpenDocument: ODT, ODS, ODP
  • Images: BMP, JPG, JPEG, TIFF, TIF, PNG, GIF, DCM, DICOM
  • AutoCAD: DWG, DXF
  • Metafiles: DWG, DXF, CAD
  • Other: HTM, HTML, CSV, DJVU, OTP, OTT

GroupDocs.Annotation for .NET Features

  • Add, edit and remove annotations and replies.
  • Export annotations to document.
  • Single function call to fetch all annotations of a document.
  • Assign value to point annotation or move existing point value.
  • Add link annotation to PDF, Word and PowerPoint slides.
  • Set background color of an annotation or remove all the annotations from document‎.
  • Annotate PDF files with accuracy – Get image representation of PDF document & cache page previews.
  • Get text coordinates of text annotation in image representation of document.
  • Link user comments to area annotation and support for nested comments.
  • Use arrow annotation for pointing to particular content.
  • Use distance annotation to draw a line that represents distance among objects.
  • Point based annotation that when clicked pops window to add comments.
  • Create a connected sequence of line segments created as a polyline annotation.
  • Create straight line segments, arc segments or a combination of the both.
  • Mark document areas proposed for redaction.
  • Add image annotation to PDF, Diagrams, Word, Excel, Presentations and Images.
  • Add text field and text based Stamp or watermark in document.
  • Strikethrough, underline or replace particular text in a document.
  • Resize annotation by assigning new height and width parameters.
  • Get thumbnails of document pages. Manage a variety of annotated docs for images and diagrams.
  • Export annotations to and work with multi-page TIFF files.
  • Adjust vertical and horizontal alignment for watermark annotation.
  • Add text horizontal alignment for text field.
  • Get information about document text lines (text, width, height, indents).