Specifically, I would like to be able to save the rotation state of a given page. I read in single page mode rotated 90 deg to fill my laptop screen. This makes text on double page spreads too small to read so I rotate them back to 0 deg. I'd like mcomix to remember which pages I've rotated for future readings. Exif metadata seems like a good place to store this but maybe it could be stored outside of the archive like the enhance image data. Saving the rotation state could be done transparently in this case, or set and stored through the Edit Archive tool if not.