'Convert to fixed content' seems to be made for that job, but it doesn't seem to work … I've tried selecting the whole text, selecting the first note number, selecting the notes, but whatever I do, choosing the 'Convert …' menu option doesn't make any difference. All note numbers (both in the text, and in the notes themselves) are still automatic note numbers in stead of just text.
Any help would … eh, well help, I guess

best regards,
Bart