What is new in the Guide in version 1.9.21?

The Guide (the button at the bottom of the sidebar) follows the new features: the book's page tour explains "Regenerate all", the amber engine label and the wand that rewrites an imported book's own chapters; the editor tour explains "Your original" in Versions; the import tour says how the AI can work on your text with your original kept; the Library tour explains the "Copy" label; the Settings tour explains that Automatic remembers its model and that "Stay on my engine" keeps the model you picked; and "Plan my book with me" shows the bigger window, the one-item-per-line fields and the new "Save .json" and "Load from a file". At the top of the Guide, "Prefer watching? Video tutorials" opens the video tutorials.