I was wondering how I can add the cadence and roman numerals as demonstrated here in this photo?
A search for “roman” yields many threads on the subject.
Perhaps the best solution is the MusAnalysis font.
But how do I do that line as you see above the word “cadence”?
It’s in the documentation for MusAnalysis. The font supports those lines. You might find it easiest to do multiple lines of lyrics and adjust them and down as needed.