Board Thread:Support Requests - Getting Started/@comment-46004342-20200919162154/@comment-9605025-20200919162520

Fandom's visual editors (on both legacy and UCP) do not have an option to insert sliders/slideshows; just galleries. If you want to insert a slider/slideshow, you will need to do so using source editor and wikitext. You can read Help:Galleries,_Slideshows,_and_Sliders/wikitext for information on the wikitext you need to use.