The 2023 Prius Prime Quick Start guide mentions that regen braking works in D or B. What is the difference? When set to B, it does show a regen braking icon on the screen and what level (1,2 or 3) it is set to. It does not show this icon when set to Drive. Do I need to bother setting to B every time I want to use regen braking, or is putting in only in Drive the same thing? EDIT: It would appear from reading the thick manual that setting to B enters Regenerative "Boost" mode... where I suppose it's just putting more charge back into the battery, or slowing the vehicle more than it would in simply Drive.