Note for unsupported popup annotation Icon

Author: manojSF3414

Xamarin/Pdf-Viewer/Popup-Annotation.md

@@ -222,6 +222,8 @@ pdfViewer.AnnotationSettings.Popup.Icon = PopupIcon.Note;
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+N>Unsupported popup annotation icons will be rendered as the NewParagraph icon.
+
 ### Changing the properties of a selected popup
 
 You can change the properties of the selected annotation by casting the sender parameter of the `PopupAnnotationSelected` event handler to `PopupAnnotation` and modify its properties. The following code example shows how to change the properties.