In the past, if you were giving a presentation with an overhead projector, you faced some limitations. The information had to be presented on a transparency sheet. You couldn’t use existing paper documents as you can with a document camera. What’s more, an overhead projector required a darkened room, making subtle details more difficult to see. With a document camera, however, you can display paper documents on a screen. You also have the option of connecting to a high-resolution TV screen that can be seen even with lighting in the room.