Few extras that just came out as we were saving and opening.

– annotated .pdfs (i.e. still editable) will not open with any notes in Dropbox (or I assume in other readers)
– I assume that flattened .pdfs (that save the annotations as images) will open with notes visible in Dropbox (or other readers)
– it might be worthwhile (in retrospect) to save as flattened .pdfs, because to open / read / grade annotated .pdfs, you have to load them all into .pdf-Notes and read them there, which is both a bit cumbersome time-wise and clogs up your library (or requires management to unclog it)

I’m sure I’ll think of some more things as the process continues.