Oh. OK: Do you have the Remote for it? in any case, you need the Disc Edit menu.
Can you find that? if so, it ought to have Finalize as an option to choose in it... or if not, what options does it have? and I will guide you further.
Actually I just found the specifics:
1. press the SETUP button
2. then scroll to DISC EDIT, press OK,
3. scroll to FINALIZE, press OK,
4. scroll to YES and press OK. With the disc to finalize already loaded, of course.
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