You don't need to regenerate the whole course to fix one part anymore. In the editor, open the "..." menu on any lesson — or use the Regenerate slide button on Presenter slides — and let the AI rewrite just that section.
- Guide the rewrite: optionally tell the AI what to change ("make it shorter", "add a concrete example", "change the tone") or pick from quick suggestions
- Change the slide type (Presenter): keep the current layout, or recast the slide as a different type — turn a content slide into a timeline, flip cards, a big stat, and more
- Preview before you decide: the new content appears live in your course, with a quick Undo if you prefer the original