I'm posting this in Mac because that's where I do most of my Evernote work, but I also use the Windows version at work and I'm seeing the same behavior in it:
When I scan in a document, a new note is created and a PDF created as per my scanner settings. The first page of the PDF is displayed in the note.
When I drag-and-drop a PDF file from my computer into a new note, all I see is the filename, date and time, and file size. Like a header.
I would like to be able to see the first page of the pdf just liked the scanned-in notes.
Is there a setting that controls this that I'm