| AnnotationProvider | Handles all annotation related operations on the owning document. |
| AnnotationProvider.OnAnnotationUpdatedListener | Listener for annotation update events inside AnnotationProvider. |
| ResizableAnnotation | This is a marker interface used on resizable `Annotation` types. |
| Annotation | Represents a generic annotation in the PDF document. |
| AssetAnnotation | Abstract subclass that contains an asset from a link. |
| BaseLineAnnotation | Abstract base class for PolygonAnnotation and PolylineAnnotation. |
| BaseRectsAnnotation | Abstract base-class of all markup annotations: TextMarkupAnnotation and RedactionAnnotation. |
| CircleAnnotation | Represents a circle on the page. |
| FileAnnotation | Represents an annotation associated with EmbeddedFile. |
| FreeTextAnnotation | Represents a free text annotation on the page. |
| HighlightAnnotation | Represents a text highlight annotation on the page. |
| InkAnnotation | Represents a freehand drawing on the page. |
| LineAnnotation | Represents a line on the page. |
| LinkAnnotation | Link type of annotation either carrying an URI or a page destination. |
| MediaAnnotation | Abstract annotation class holding a media file asset. |
| NoteAnnotation | Represents a note (shown as an icon) on the page. |
| PolygonAnnotation | Represents a closed polygon on a page. |
| PolylineAnnotation | Represents a polyline on the page. |
| RedactionAnnotation | Represents a redaction annotation on the document. |
| RichMediaAnnotation | RichMedia annotations are defined in the ISO32000 Adobe Supplement and are the modern way of embedding video content. |
| ScreenAnnotation | A screen annotation (PDF 1.5) specifies a region of a page upon which media clips may be played. |
| ShapeAnnotation | Abstract base-class of all shape annotations: LineAnnotation, SquareAnnotation,
CircleAnnotation, PolygonAnnotation, PolylineAnnotation. |
| SoundAnnotation | Represents an audio file added to a page. |
| SquareAnnotation | Represents a square rendered on the page. |
| SquigglyAnnotation | Represents a squiggly text underline on the page. |
| StampAnnotation | Represents a stamp or annotationBitmap annotation on the page. |
| StrikeOutAnnotation | Represents a strike-out text on the page. |
| TextMarkupAnnotation | Abstract base-class of all text markup annotations: HighlightAnnotation, SquigglyAnnotation, UnderlineAnnotation and StrikeOutAnnotation. |
| UnderlineAnnotation | Represents underlined text on the page. |
| UnknownAnnotation | Represents an annotation that is currently not recognised and handled by PSPDFKit. |
| WidgetAnnotation | Represents the appearance of a field in interactive forms. |
| AnnotationFlags | Specifies various characteristics of the annotation. |
| AnnotationType | All currently supported annotation types. |
| AnnotationZIndexMove | The possible z-index moves that can be applied on the annotation. |
| BlendMode | List of blending modes available for the annotations that can be set by setBlendMode(BlendMode). |
| BorderEffect | Border effect types for annotations. |
| BorderStyle | Border style types for annotations. |
| FreeTextAnnotation.FreeTextAnnotationIntent | Possible styles of free text annotation. |
| FreeTextAnnotation.FreeTextTextJustification | Possible values for the alignment of the text. |
| LineEndType | Types of available line ends in annotations. |
| MediaWindowType | The type of the window to display the media in. |
| VerticalTextAlignment | Possible values for the vertical alignment of the text. |