In the last couple of days I have twice lost my annotations due to freezes of my M92. As far as I can tell M92 saves the annotations (and all other settings) for the current document when it closes it. I think it would be a good idea to have a "paranoid" mode, where the annotations are saved after each page turn (or every minute, two minutes ...), so that in the case of a freeze-up not all annotations of the current session get lost.
Regards,
Dimitris
Regards,
Dimitris