| Name | Description |
|---|---|
| Text | Text annotation type. |
| Circle | Circle annotation type. |
| Polygon | Polygon annotation type. |
| PolyLine | Plyline annotation type. |
| Line | Line annotation type. |
| Square | Square annotatotion type. |
| FreeText | Free text annotation type. |
| Highlight | Highlight annotation type. |
| Underline | Underline annotation type. |
| Squiggly | Squiggle annotation type. |
| StrikeOut | Strikeout annotation type. |
| Caret | Caret annotation type. |
| Ink | Ink annotation type. |
| Link | Link annotation type. |
| Popup | Popup annotation type. |
| FileAttachment | File attachment annotation type. |
| Sound | Sound annotation type. |
| Movie | Movie annotation type. |
| Screen | Screen annotation type. |
| Widget | Widget annotation type. |
| Watermark | Watermark annotation type. |
| TrapNet | Trap network annotation type. |
| PrinterMark | Printer mark annotation type. |
| Redaction | Redaction annotation type. |
| Stamp | Rubber stamp annotation type. |
| RichMedia | Rich media annotation type |
| Unknown | Unknown annotation. |
| PDF3D |