It seems to have a bug in the epub annotation: sometimes the underlines doesn’t work or have some weird width and alignment.
Hi Iserlonhn,
Welcome new to the forum!
Sorry for the late reply. Although MN support multi-formats like epub pdf txt, the main new feature is focused on the PDF. So it is suggested to transfer your files into PDF for further note.
1, Calibre supports converting ePub files into PDF ones, and MarginNote 3 has a more robust tool set for PDF annotations.
2, Convertio is an online service to converting epub into PDF.
Regards,
Lanco
Support Team