If it came into me I'd repeat the cue and send him back out. I'd do the same for the trot and if room allowed, the canter. A cue can be a word or an action that tells a horse to perform an action. Ideally you want your actions to complement and encourage the horse's actions. You can have both a word and an action cue that says the same thing and can be used interchangeably.
Horses can build up quite a repertoire of cues.
John Lyons teaches 8 foot cue locations from the saddle alone. You're doing well and you'll figure out the cues that work best for you.