The final way of involving your audience is to work hard at communicating your presentation to all areas of the room. This requires energy as you will need to make sure that your voice and gestures are 'big' enough to communicate over a distance. A presenter who stands and reads with his or her eyes buried in a script will only ever communicate over a limited distance. However, a presenter who is working hard at making eye contact, pays attention to the volume of his or her speaking voice, conveys enthusiasm for ideas and uses facial and body gestures to welcome, reassure and involve the audience will be transmitting energy over a much wider area.
Whilst a presenter should always appear natural and avoid using exaggerated behaviour to get a message across, an effective presentation is hard work to deliver because there are so many elements to control. The effort of creating and pushing out enough energy to make an impact will be tiring, but worth the extra work.