Song Fonts controls the lettering on the chart itself: headings, chords, lyrics, and each named section. Also affected by Song Zoom
Section Headings, Chords, and Lyrics each have a size, a Color and Highlight for Dark Mode and for Light Mode, plus Bold and Italic.
Default, Intro, Verse, Chorus, and Bridge can each override that type. A section you add with Add more lyric sections gets the same controls. The dialog to add one is titled Add Section. An existing name opens Edit Section Name.
The permanent five cannot be removed. A section you added can be.