How do you adjust the lighting for the best image?

• If you are presenting printed material or 3-D objects, the two upper lamps will provide ample light. If the ambient lighting in the room is sufficient, however, you may obtain a better image with the upper lamps off. Press the Upper button on the control panel or remote control to turn off the lamps. Press it again to turn the lamps back on. If you are presenting transparent material, such as an overhead transparency, x-ray, slide, blueprint, or negative, you need to use the base lamp. Press the Base button on the control panel or remote control to turn on the base lamp. The upper lamps will turn off automatically. Note: You can't have the upper and base lamps turned on simultaneously.