People use the white screens for:
White screen for drawing copies
To make it easy to redo an image, I required a bright surface under the paper.
A light source is a white screen.
illuminating a lightbox's back for product photography
To test the monitor, a white screen
Look for dead pixels on your display.
A black or white screen
Want to avoid interruptions? Would you like to pause? To clear your screen, use a white background.
White screen as a reading light
must find a light source so you can read books in the dark when the light switch is too far away.
Using a white screen as a makeup light
as a strong light source for shooting photographs or applying cosmetics
Monitor cleaning with a white screen
Even though it's absurd, I use it to clean my display. It makes what appears on the screen clearer. Although this only seldom occurs while I'm not looking for professional color grading, I also use it to examine how well various displays represent simple colors.
Using a white screen to check for dust
I use the same background to check for dead or stuck pixels and clean my display. I use it occasionally to light up my face while I'm on a camera.
Use a white screen to trap flies.
Little flies were lured to the white screen on my monitor, and I began capturing them.
To create a flipbook, use a white screen.
Since I don't have a professional screen for this, I'm using my computer and putting the white screen on it, so I don't touch anything by accident. I'm working on an animated sequence, and I'm doing it the traditional way (by hand), I thus require a white surface with light so that I can place one piece of paper over another and view both of them.
White screen to help you concentrate
I utilize two displays when I'm studying, one for a timer and the other for online searches. I leave the screen blank while I'm not searching so that I won't be interrupted by anything on the computer.