# Development

- [Menu structure and CSS](/manual/website/help.naviplus.io/development/menu-structure-and-css.md)
- [How to write a correct CSS code in Navi+](/manual/website/help.naviplus.io/development/how-to-write-a-correct-css-code-in-navi+.md)
- [Add walk-through to Navi+](/manual/website/help.naviplus.io/development/add-walk-through-to-navi+.md)