Using the following command for a large number of notes is really too cumbersome
Choose Edit > Notations > Stem > Force Stem Up. (Force Stem Down)
And, I cannot find a way to select more than one note to flip the stems in one go!
Is there a better way? In Finale I’d just press the letter “L” to freeze the stem in the opposite direction.
EDIT: To select multiple notes & flip their stems: Hold Command and select desired notes then press F