ScreenTools guides

Short guides for common screen, light and monitor testing tasks.

What Is a White Screen Used For?

Learn practical uses for a white screen, including light, video calls, cleaning, focus and monitor checks.

Use solid full-screen colors to check a monitor, phone or tablet for dead or stuck pixels.

Turn a phone, tablet or monitor into a simple light source using full-screen white and warm colors.

Clean a phone, laptop, tablet or monitor screen safely with a soft cloth and simple checks.

Learn which solid colors help reveal dead pixels, stuck pixels, backlight bleed and uniformity issues.

Use a white or warm white screen as a simple light source for video calls.

Compare white and black screens for lighting, focus, cleaning and monitor checks.

Use a black screen in a dim room to inspect edge glow and possible backlight bleed.

Learn the difference between dead pixels and stuck pixels and which colors reveal each issue.

Pick simple screen colors for focus, breaks and low-distraction second monitors.

Use your phone, tablet or monitor as a simple light without straining your eyes.

Check a used monitor with browser-based color, pixel, uniformity and backlight tests before you buy.