Give essays and courses a reading layout
Set "layout": "reading" to centre the text, put the page contents on the left as a rail and move the site contents behind a menu button.
Your site can now have a reading layout. Add "layout": "reading" to config.json and pages get a centred reading column, their page contents as a rail of ticks at the far left, and the site contents behind a menu button at the top left. Ordinary pages get previous and next links in the order of the site contents, so readers can move through a course or a set of essays without opening the menu.
The default layout, now called docs, is unchanged: site contents on the left, page contents on the right. Set layout: docs or layout: reading in a page's frontmatter to change one page. For a home page that keeps the site contents while the pages behind it use the reading layout, set the site to reading and the home page to docs.
See Site layouts for the recipes and the rules.
