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Xamarin / Guides / Flatten annotations
To flatten annotations in a PDF document.
PDFDoc doc = new PDFDoc(filename); // flatten all annotations doc.FlattenAnnotations();
PDF interactive forms (AcroForms)
Full sample code which illustrates some basic PDFNet capabilities related to interactive forms (also known as AcroForms) and annotation flattening.
Annotation or form flattening refers to the operation that changes annotations (such as markup, widgets, 3D models, etc.) into a static area that is part of the PDF document, just like the other text and images in the document.
Annotation.Flatten(page), it is possible to merge individual annotations with the page content. Apryse SDK also allows you to flatten all forms in the document in a single function call, with
Widget annotations share a relationship with forms because the display of a form field is a widget annotation. The process of flattening annotations therefore can flatten forms as well. By flattening and merging existing annotation appearances with page content, the original annotations are deleted from the PDF pages.
Note that it is not possible to undo the flatten operation. An alternative approach to annotation or form flattening is to set the annotation to
e_read_only flag on the annotation enables this modification.
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