- Add AnnotationOrigin enum (BottomLeft/TopLeft) - BottomLeft = PDF native coordinate system (default) - TopLeft = UI-friendly coordinate system (requires Y-axis conversion) - Shared with stamp operations for consistency
- Add AnnotationOrigin enum (BottomLeft/TopLeft) - BottomLeft = PDF native coordinate system (default) - TopLeft = UI-friendly coordinate system (requires Y-axis conversion) - Shared with stamp operations for consistency