2.0 http://www.w3.org/2005/Atom Groupdocs API References – GroupDocs.Annotation.Models.AnnotationModels https://reference.groupdocs.com/annotation/net/groupdocs.annotation.models.annotationmodels/ ......WatermarkAnnotation class Represents watermark annotation properties highlight...get; set; } Gets or sets watermark rotation angle ../../groupdocs...