A Cross is an canine agility term that describes a change of working sides. Your dog moves from your left to your right (Heel to Side) or from Clock to Counter.
Crosses are labeled be the relationship of handler to the dog. A Front Cross is a cross with the handler in front of the dog. A Rear Cross has the dog switching working sides with the handler behind the dog. A Blind Cross is a cross where the handler and the dog can’t see each other.
Any time your dog crosses from your left to your right side, or vice versa, some kind of cross happens.