In other PDF apps one can export a PDF file with hand-drawn annotations and text notes added to it and still have those additions be editable in another PDF app (for example, exporting a PDF from Adobe Reader to another app still allows for the editing of notes and handwriting which were added in reader to be edited). It would be great if this were possible with PDFs exported from MarginNote as well; currently it seems that the app only exports flattened PDFs.