User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-35314284-20201009134602/@comment-44807868-20201010045536

@MrYokaiAndWatch902: Hmm, I'm not sure why there doesn't seem to be a way to customize the galleries through the Visual Editor on UCP anymore. I swear it used to be there...

But it's definitely still possible to customize the galleries; you just have to do it through source editor; see Help:Galleries, Slideshows, and Sliders/wikitext (especially Help:Galleries, Slideshows, and Sliders/wikitext) for more information. You can see a working example there!