How to recover deleted document/document view

I accidentally deleted a pdf from document view. The file and notes are still available in study mode. However, when I try to switch from study mode to document mode, the file is blank.

Does anyone know how to recover a deleted document? Looking in the trash doesn’t reveal anything…

MN don’t make any change on documents, and store all your notes& annotations on note database. So we didn’t provide trash recovery for documents. But we’ll consider make a document trash in future release.