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Defines access permissions granted by a signature to the signed document.
public enum AccessPermissions
FormFilling = 2
Permitted changes are filling in forms, instantiating page templates, and signing; other changes invalidate the signature.
FormFillingAndAnnotations = 3
Permitted changes are the same as for FormFilling, as well as annotation creation, deletion, and modification; other changes invalidate the signature.
NoChanges = 1
No changes to the document are permitted; any change to the document invalidates the signature.