On the ground I point at his chest. I've also taught him to back up from a finger wiggle, as we used to share the field with a NH person This was the cue she taught her horses and I wanted him to understand her. Strangely, he never did - must be something about her intent that didn't appeal to him So he'll back up from a finger wiggle from me and my partner, but her finger wiggle just didn't have the magic
Ridden, I lean forward slightly, legs on lightly and take up a light contact.