New preview editor in xcode
- Realtime view of the rendered documentation
Use two backticks to link to a project symbol
Select build documentation to build your project, as well as all dependencies.
Overview and topics, see Improve the discoverability of your docc content
Newly you can document the extensions you make to external types, such as an extension to the swiftui view.
Documentaiton catalog: add supporting files, such as images and long form markdown articles.
- “Getting started”, “main concepts”, etc
- Automatically chooses between light and dark modes of images.
- The top level page has the same name as the project.
  - Topics and groups just use markdown headings and lists here.
- Links to these page: <doc:Title>
Markdown extensions: Directives
- Grids: @Row { @Column {} }
  - @Column(size:3)
- Tabs: @TabNavigator { @Tab("Title) {} }
- @Video(poster:source:alt:)
- @Metadata {}
  - Call to action
  - page kind
- @Links
  - card uses @PageImage(purpose:source:alt:)
- @PageColor
Themes
- Made in a theme-settings.json file in the documentation catalog
- Applies to web only, not when viewed in xcode
New quick navigator, jump to page, with shift cmd O.

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Create rich documentation with Swift-DocC