> For the complete documentation index, see [llms.txt](https://docs.bird.com/taxi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bird.com/taxi/projects-mailings-and-versions/parent-versions-and-child-versions.md).

# Parent Versions and Child Versions

- [Creating and using Parent Versions](https://docs.bird.com/taxi/projects-mailings-and-versions/parent-versions-and-child-versions/creating-and-using-parent-versions.md)
- [Synchronising content between the Parent version and other versions](https://docs.bird.com/taxi/projects-mailings-and-versions/parent-versions-and-child-versions/synchronising-content-between-the-parent-version-and-other-versions.md)