Aoede reads a book aloud and highlights the word it's speaking, like karaoke. Until this week that highlight was a single word in the crisp voice modes. You could see the word, but not where its sentence began or ended, so following along while it read at speed meant hunting for your place every time your eyes drifted.
Now the whole active sentence lights up under the word, in every mode. A soft band marks the sentence, a crisp pill marks the word, and the two move together. That band used to be reserved for the rough fallback timing; dropping the gate turned it into a steady line you can rest your eyes on.
The other half of "follow along" is that the page has to move itself. The reader now anchors the active line a little above center and nudges up a line each time the voice crosses into a new one, on a single spring so chained scrolls blend into one motion instead of lurching. Two bugs only surfaced once the band was always on: words joined by an em dash with no spaces were drawn as one token but spoken as two (they split at the dash now, while staying visually glued), and adjacent bands overlapped just enough that their translucent fills darkened every boundary. Tiling each band to exactly half the gap turned the striping into one even tint.