Knowing how to teach a new behavior is a great skill to have, because it gives you the ability to teach your dog ANY behavior you want (that your dog is physically capable of doing).
If the behavior you desire him or her to know is something he or she already knows then its super easy to capture the behavior. When your dog does the behavior click and treat, C/T. Do this multiple times and once your dog is reliably doing the behavior, you can start putting it on cue.
If its something your dog doesn’t do on his or her own, then you’ll need to shape it. Shaping is breaking the behavior down in small steps. The important thing to remember is that the steps have to be small and attainable to your dog. Break down step as small as possible. You’ll want your dog to know the whole behavior before adding the cue AND do it reliably.
Remember when adding the cue, start at the time the behavior begins and work your way to before your dog does the behavior.