Call the Add method to add the annotation on the page.Create an instance of class corresponding to annotation type you want to add to a page, for example, TextAnnotation class.These annotations reside in the Page object on which they are placed. GcPdf allows you to add annotations to a page in the PDF document. using Flags property that accepts the values from AnnotationFlags enum. GcPdf also allows you to specify various characteristics of annotation such as visibility, printing, etc. It is listed in the the topic Annotation Types.Īll the listed annotations have a dedicated class and properties in the GcPdf library which makes it easier to implement different annotations. GcPdf offers a variety of standard annotation types. PDF Reader lets you make PDF annotations, including highlights, underlines, strikethroughs, handwritten notes, and more. ![]() In the opened state, these annotations display the associated object such as a pop-up window containing associated text. For more information on annotations and its types, see PDF specification 1.7 (Section 12.5). The base class of all PDF annotations is PdfAnnotation which can be accessed via the Annotations property of the PdfPage class. It also has a great user interface which makes it extremely easy to use. It comes with more features than most of the other available PDF annotation programs. In the closed state, they appear on the page as a note, icon, or a box, depending on the annotation type. PDFelement Pro is the best annotation software for Windows. ![]() A number of annotations can be displayed either in open or closed state. ![]() The purpose of using annotation is to simply associate information or a note with an item on a page. An annotation is used to mark or highlight texts, images and other visual elements on a page. Annotations can be text, image, shape, sound or even file attachments.
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