Homepage carousel - phone banners

One portrait image (1080 × 1350 px, 4:5, JPG/PNG/GIF/WebP, max 8 MB) per carousel slide; the files are kept in the store's /content/banners folder. Slide 1 here is the first slide in Storefront › Home Page Carousel, slide 2 the second, and so on. Slides without a phone banner show the wide desktop image on phones. Drop a file on a slot or click Choose image; the storefront updates within a minute.