Two ways you can do it ... if you tell him while setting up for the exercise, ie. before the judge says “are you ready” and you respond “yes”, then it’s not scoreable as long as it’s just a single command (if you harp on it too much could be considered training in the ring). The other way to do it, which I prefer, is if your dog knows a hand signal for “stay”, then since you can give both a voice and signal on that exercise, you can signal “stay” while commanding “leave it”. That way, no extra commands, no training in the ring :-) Not the judges business what commands you give for each exercise as long as you only give one.