Bob,If I understand you correctly, uppercase root should mean major, whereas lowercase root should mean minor. so that
A
means an A major triad (a, c#, e), whereas
a
means an A minor triad (a, c, e).
And similarly,
A7
for (a, c#, e, g), and
a7
for (a, c, e, g) (= Am7 in standard notation).
Unfortunately, Finale doesn't work that way.
Finale CAN display the root in lowercase. If you enter chords with the "Type Into Score" mode, you can simply type the root in lowercase. To change roots already entered in the score, use the Mass Edit Tool:
Mass Edit menu - Change - Chord Assignments...
But that doesn't change the chord playback! A7 and a7 will play back as the same chord, since the chord suffix is the same. If playback is an issue, you have to use a workaround, e. g. edit all the "minor third chords" (m7, m9 &c.), and replace the "minor third symbol" with a "hard" space character. This space character doesn't have to take up horizontal space in the suffix; in the Chord Suffix Editor you can set the horizontal position of each character of the suffix, thus left-pushing the characters following the space character. The appropriate key combination for a "hard" space:
Windows: Alt-160 in text fonts (e. g. Times New Roman), Alt-202 in music fonts (e. g. Maestro)
Mac: Option-Spacebar
Unfortunately I don't think that there is a way to edit all the "minor third chords" globally in one go; you have to edit the suffixes one by one.
To change the alternate bass position in chords already entered, use the Mass Edit Tool's "Change Chord Assignments...".
Peter