From the manual:
Low (L)
You can activate this position at any
vehicle speed which provides an increased
level of deceleration when you lift off the
accelerator pedal. You can use low (L) at
all times, if desired, but improving
drivability while descending grades is the
intent. Entering low (L) does not take any
actions if one pedal drive is active.
I just watched a video that mentioned that if you "brush" the brake pedal while in the one-pedal mode you get increased re-gen. braking without actually applying the brakes. Is this true?