Thanks for the replies so far!
I have looked a tiny bit into Table Edit, but I am not sure either of the suggestions reflect my way of thinking. As I have a lot of experience with music in general, but not much with the ukulele, I find standard solutions a bit restricting. Also in Finale which changed my input to a standard solution for the given chord.
As I want chords being understood without a bass line, I usually go for these steps being part of major chords: root, third, seventh, and ninth. In minor chords they are root, third, seventh, and eleventh.
On a C-tuned uke there is a very effective Fmaj9th fingered with just the 5th fret pressed on the C-string. But at least Finale doesn’t like the note on the C-string being a semitone higher than the note on the E-string.
My wish is for a solution shall not have a normal default. It shall take what I write without comparing to convention. It might be possible to set up a spreadsheet to do the diagrams, but that hardly would include the option for a musical staff-representation.
Klaus