the image that makes a coach's words finally land
letting the kids see on the screen exactly what a coach or prorector’s talking about. The reason being it’s a lot easier to fix something if you can see it.
Context
Mario's job is a small working channel: the coaches' verbal instruction keeps missing until it's routed through an image, the player shown on screen "exactly what a coach or prorector's talking about," because a thing said about your own body reaches you only once you can see it. A minor but genuine entry in the book's ledger of technologies that actually transmit — meaning that couldn't cross in words crossing as a picture.