Texas Instruments TravelMate 3000 - Standard;Reverse Switch

LCD Screen
Standard/Reverse Switch
The screen normally displays black characters on a white background. You can reverse
this image to white on black by setting the standard/reverse switch to the q (reverse)
position.
Some graphic images may display like a photographic negative on the LCD screen.
Reversing the image should correct this effect.
Learning About Your Computer 2-5