We often have to consider two types of users: the ones who know what they want, and the ones who don’t. Let’s call them experts and beginners. The nice thing about experts is that they tend to go looking for expert mode and are usually good at finding it. Beginners need to have their hands held. So if you’re torn between which mode to make dominant, make beginner mode dominant. Experts are far more likely to be able to find a tiny button that toggles their preferred mode.