To avoid all documents having to be released seperately, one has the option of releasing all subordinate documents in one step along with the corresponding document (this is only possible if your software version does not include the four eyes principle).
In order for all subordinate documents to be released the parent document, i.e. the level from which the recursive publication is to be started, must have the status 'in production'.
In this case you can select the desired publication in the tab 'document properties' in the drop down 'recursive publishing'. If you select 'all', the status of all child documents will be changed to 'in production'.