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Guides
Overview

PDF annotation library for Xamarin

Annotations allow users to mark up and comment on PDFs without altering the original authors content.

PDFTron SDK Benefits include:

  • Infinite Undo/Redo
  • Support for annotation flattening
  • Support for annotation appearances
  • XFDF Import
  • Export annotations to FDF, XFDF, text, or PDF annotation summary
  • Sticky (Note)
  • Comments
  • Text markup (highlight, squiggly, underline, strikeout)
  • Add shapes (line, arrow, polyline, rectangle, ellipse, polygon, cloud)
  • Cloud annotations
  • Apply freehand ink annotations
  • Signatures
  • Save the annotations into the PDF file
  • File attachments
  • Sound, movie, and 3D annotations
  • Support for custom annotations
  • FreeText, Callout
  • TextHighlight, TextUnderline, TextSquiggly, TextStrikeout
  • Stamp
  • Redaction

Get started

Annotation namespaces
Lists of namespaces in the PDFTron libraries containing the annotation tools.

Annotation tools
An introduction to annotation tools and ToolManager.

Config annotation tools
To configure annotation tools using ToolManagerBuilder.

Import annotations
To import a full set of annotations in a document using XFDF.

Export annotations
To export a full set of annotations in a document using XFDF.

Annotation sync
To import and export a partial set of annotations in a document using XFDF.

Annotation list
To display a list of all annotations in a document.

Annotation toolbar
To display a toolbar to create annotations and easily switch between different annotation tools.

Style editor
To display a style editor where users can change annotation colors.

Style properties
To set an annotation style property such as color, interior color, border style, padding, etc to an annotation.

Default style properties
To configure default annotation style properties such as border color, border thickness, fill color, and more.

Toolmanager Events/triggers
An introduction to events and triggers available from the ToolManager.

Custom appearances
To customize an annotations appearance such as with a custom image.

Custom event handlers
To customize event handling behavior before executing or notified of actions as it happens.

Remove annotation
To remove an annotation from a document.

Read only mode (Android)
To disable all interactions by enabling read only mode.

Disable create/edit
To selectively disable creation or editing of annotations.

Show/hide annotations (Android)
To show or hide annotations altering the annotations visibility.

Get the answers you need: Support

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