Clear design should…Above all, be useful. Get the user's job done, and get out of the way as fast as possible. But also while at it, it should… Be unambiguous. Only one possible interpretation should exist for every design element. Be predictable. Design elements should help people accurately and consistently predict what happens when they interact with your product. Be helpful. Design should help people answer all these questions:Where am I? How did I get here? What can I...