Change the quantization settings as needed
in the Quantization Settings dialog box. Click the note that you
want to be the smallest note value and the type of quantization you require.
Choose whether you want grace notes and an inner voice notated in the
selected region by clicking More Settings. The More Quantization Settings
dialog box appears. Change your settings and Click OK. See Quantization Settings dialog box and
More Quantization
Settings dialog box for more information.
Choose MIDI/Audio > Retranscribe.
Finale retranscribes the region according to the new settings. All MIDI
information is maintained, but if any markings appeared on the original
notes, they are removed.