Your dog learns to look to you on cue.
Call your dog’s name. If he looks around or moves his ears in your direction, say GOOD BOY and give him a treat. He doesn’t have to come, to sit, or to lie down. It’s about him reacting to his name. If he doesn’t look, then put a treat to his nose. When he wants to take it, move your hand with the treat slowly towards your eyes, saying his name at the same time, then give him the treat. See how much more quickly he will react to hearing his name the next time.
Look in your eyes. Some pups find it difficult to look directly into your eyes. In dog language that can be interpreted as a threat. In that case, still move the treat towards your eyes but close your eyes for a moment while you do it. That way he knows that looking in your eyes isn’t a threat.
The name exercise is useful to get your dog’s attention. Only when he will look at you and you have his attention can you then ask him to sit, come, or come here …