Make your voice go down in pitch at the end of a phrase or sentence. This technique emphasizes what you're talking about. If you want to also add to your presence, pause after speaking.
Nola is an amazing public speaking coach! I just gave the best presentation I've ever given to over 200 people in person last week. I received many compliments. Not only did Nola help me with structuring my speech, but she also taught me many speech techniques that can help engage the audience and make me sound more confident in my presentation.