[Newbie... sorry for the dumb questions]
Just getting started and noticed that one of my notes has a checkbox. Don't know how it got there. What is it for?
ALSO, I'm just starting to move from OneNote. I don't see a ENEX export option so cut & paste for 10+ years of OneNotes will be painfully slow. Any suggestions?
ENEX is a proprietory format developed by Evernote. You could use Evernote‘s import options to access your OneNote data and then export as ENEX. On GitHub you can find a Markdown exporter for OneNote (MD is Joplin‘s native format), but that seems to be rather experimental to me.