Speaking is a cooperative act.
Speaking is a cooperative act – the speaker gives the listener ideas and the listener gives the speaker attention. Yet, the best presentations are far more cooperative than that. They involve a sort of team chemistry where speaker and listener fall into sync.
To cultivate this chemistry when you present, give your attention to the listener. Return the favor. They will talk back to you, even if it is only with their facial gestures and body language. If you 'listen' to those signals and let them affect you, you create the possibility of falling into sync.