Explained here: https://www.loom.com/share/1522c194c5774a41bec62b830a28a691
Right now when adding categories to carousel, it breaks out to multiple carousel and allows you to add multiple products to each category. If there were an option where we can house multiple categories in 1 carousel, users wouldn't have so scroll and brands have more variety with outcomes. This would work great for routine based quizzes where you can swipe through a carousel of (ie) steps 1-5.
I discussed this with Rosie, but this feature already exists. There's a checkbox underneath where you group categories giving the user the option to add in one carousel or make each distinct category its own carousel.