A screen annotation: a region of the page where media clips may be played.
public sealed class PdfScreenAnnotation : PdfAnnotation
ISO 32000-2 §12.5.6.18, Table 190 (PDF 1.5). Media are parse-and-preserve: the annotation's actions are exposed and never performed.
kind:method, kind:property, kind:ctor. Press Esc to clear.ActionGets the action performed when the annotation is activated (A, PDF 1.1), or null.AdditionalActionsGets the actions performed on the annotation's trigger events (AA, PDF 1.2), or null.AppearanceCharacteristicsGets the appearance characteristics dictionary used to construct the appearance (MK), or null.ScreenTitleGets the title of the annotation (T), or null.