If I remember correctly, the tabber can't be child of another tabber. But there is Tab view which I think is able to do so. The page includes a styling guide. A styling guide for tabber can be found at TabberDesign. Retrieved from "https://community.fandom.com/wiki/Board_Thread:Support_Requests_-_Getting_Technical/@comment-4503522-20140407071143/@comment-770155-20140408222622?oldid=1234246" Community content is available under CC-BY-SA unless otherwise noted.