The visualizers or document cameras have to a large extent replaced the Over Head Projectors and are wired into the VAVS switching controls for ease of use. They can be used to show documents, handwritten notes, book pages, objects of interest and much much more. Your imagination is the limit!
There are only a few adjustments to make for these useful gadgets to come alive. The areas of interest have been highlighted in purple on the image below!
There is a Power On/Off switch in the top right hand corner.
To turn the light On/Off, press the button so marked on the lower right.
To zoom in on the object on the display area, turn the zoom knob.