Every dressage test begins with the horse and rider coming down the centerline and halting at X in the middle of the arena. The rider salutes the judge who is seated at the end of the arena and the test begins. Seven minutes of solitude. Just the horse and rider. No one else is in the ring with them.
At the end of the test they come back down the centerline again and halt( it should be a square halt with the horse’s feet squarely under him) and salute. The rider pats the horse and they walk out to rejoin the world. The solitude is over.