I just started delving in the starter template and learning about the slice machine.
I can see that each slice has a model.json, where I can define variations, but is there any way to define those in visually? Also, how are these displayed in Prismic in the content room?
Currently slice variations are not released, they will be somewhen at the beginning of next year hopefully. Preparation work has been made for those that's why you can notice some reference in the model.json file~