One thing people that worry about when using PowerPoint is what to do when the light from the projector cuts the room in half.
Youâ€™ve seen the problem. Your projector is on a table at the front of the room and the light from the projector is shining on the screen such that you canâ€™t walk across the front of the room without blinding yourself and briefly blocking the screen.
If you never cross in front of the light, you feel cut off from one side of the room and hence, half the audience.
The solution: Try to stay to one side for about half the time and then cross over in front of the light, moving quickly to ensure that you can connect with the other half of the room.