2017 Prius Prime Backup Camera

I feel a little stupid asking this, but hey, here goes. My Prius doesn't have the yellow guidance line that moves as you turn when backing up (as well as the blue). It's supposed to, right? After driving a Lexus rental (which has this feature), I watched a video that a hard turn to the left and then to the right would activate (re-activate?) this feature on my Prius. It didn't.