Mention the alias defaults to project's slug
@@ -647,7 +647,8 @@ Subproject create
`See Subproject details <#subproject-details>`_
:>json string child: slug of the child project in the relationship.
- :>json string alias: optional slug alias to be used in the URL.
+ :>json string alias: optional slug alias to be used in the URL (e.g ``/projects/<alias>/en/latest/``).
+ If not provided, child project's slug is used as alias.
:statuscode 201: Subproject created sucessfully
