Supported PDF Annotation Types on iOS

PSPDFKit supports all common annotation types:

• Link

• Highlight, Underline, Strikeout, Squiggly

• Free Text

• Ink

• Square, Circle, Line, Polyline, Polygon

• Note

• Sound

• File

• Widget (requires the Forms component)

• Image/Stamp

• Rich Media/Video, Screen

• Caret

• Redaction (requires the Redaction component)

These are standard annotations (as defined in the PDF Reference) that can be read and written by many apps, such as Adobe Acrobat and Apple Preview. Most of these annotation types can also be written back, except for rich media/video, file, and widget annotations. For more details, refer to the What Are Annotations? guide.

Signature Annotations

Ink and image annotations may be used as signatures. Please see Adding an Electronic Signature to learn more. Using the signature tool requires the Electronic Signatures component. For licenses originally obtained in April 2021 or earlier, limited signing functionality is available with just the Annotations component.