Fade, do not re-read
Each pass removes more of the visible text. The difficulty rises as you improve, which keeps the practice effortful rather than comfortable.
Use case
Delivering a speech word-for-word
Delivering a speech from memory is a different task from understanding it, and reading it aloud repeatedly is a poor way to practise, because the page carries the recall for you. Verbatim mode fades the text progressively: first the odd word, then phrases, then whole clauses, until you are producing the passage unaided. Progress is tracked per passage rather than per session, so you can see which paragraph keeps collapsing and rehearse only that. The same mode works for anything that must come out exactly as written, including scripts, legal testimony, liturgy, oaths, and lines for a performance.
Rehearse the paragraph that keeps breaking
Progress is recorded per passage, so the two paragraphs that keep collapsing get the practice instead of the whole speech getting another read-through.
What it will not do
It rehearses the words. Delivery, pacing, gesture and room presence are not measured and still need a rehearsal with a human in it.