There are basically two ways of throwing things to the rear display: In a customized app (made either by Yota or by a third party using the open APK), you can tap a symbol in the top right corner and the app will send currently displayed items across to the back.
He's a living symbol of a lesson that many top-tier athletes seem unable to learn once they get to the pros: That as good as you already are, you can always get better.