| Name | Type | Value | Description |
|---|---|---|---|
| TEXT | str | "Text" | Text annotation type. |
| CIRCLE | str | "Circle" | Circle annotation type. |
| POLYGON | str | "Polygon" | Polygon annotation type. |
| POLYLINE | str | "PolyLine" | Plyline annotation type. |
| LINE | str | "Line" | Line annotation type. |
| SQUARE | str | "Square" | Square annotatotion type. |
| FREETEXT | str | "FreeText" | Free text annotation type. |
| HIGHLIGHT | str | "Highlight" | Highlight annotation type. |
| UNDERLINE | str | "Underline" | Underline annotation type. |
| SQUIGGLY | str | "Squiggly" | Squiggle annotation type. |
| STRIKEOUT | str | "StrikeOut" | Strikeout annotation type. |
| CARET | str | "Caret" | Caret annotation type. |
| INK | str | "Ink" | Ink annotation type. |
| LINK | str | "Link" | Link annotation type. |
| POPUP | str | "Popup" | Popup annotation type. |
| FILEATTACHMENT | str | "FileAttachment" | File attachment annotation type. |
| SOUND | str | "Sound" | Sound annotation type. |
| MOVIE | str | "Movie" | Movie annotation type. |
| SCREEN | str | "Screen" | Screen annotation type. |
| WIDGET | str | "Widget" | Widget annotation type. |
| WATERMARK | str | "Watermark" | Watermark annotation type. |
| TRAPNET | str | "TrapNet" | Trap network annotation type. |
| PRINTERMARK | str | "PrinterMark" | Printer mark annotation type. |
| REDACTION | str | "Redaction" | Redaction annotation type. |
| STAMP | str | "Stamp" | Rubber stamp annotation type. |
| RICHMEDIA | str | "RichMedia" | Rich media annotation type |
| UNKNOWN | str | "Unknown" | Unknown annotation. |
| PDF3D | str | "PDF3D" |