I have made a few navigation improvements to the Toolbar Tutorial. Each chapter now has a link back to the Table of Contents, which should be useful if you land on an interior page via a search engine. The new link appears at the bottom of each chapter in the chapter navigation block.

Would having a copy of this navigation block at the top of each chapter's page be useful? It's a bit of a bother to have to scroll to the bottom of each chapter to find a link to the next one. If you think that would be a useful addition, let me know in the comments below.