Screen burn-in test
Editing software keeps the same panels in the same place for years. On an OLED, that can leave a mark. Flat grey shows it.
The cycle changes once every two seconds. Skip it if changing light bothers you.
What I look for
- The outline of the layers panel or toolbar down one side.
- A lighter rectangle where a white document usually sits.
- The menu bar or taskbar edge.
If the shape fades after ten minutes of the slow cycle, it was temporary retention. If it stays, it is wear. A retained light rectangle in the middle of the screen is a real problem for judging white backgrounds, because it shifts the tone exactly where the product sits.
Prevention
- Hide panels when you are not using them, or move the workspace occasionally.
- Edit at 100 to 120 nits, not full brightness.
- Let the display sleep when you leave the desk.
Then check levels with the calibration patches.
Questions
Rarely. They can hold a faint image briefly, which clears. OLED panels are the ones to watch.
White uses every subpixel at once, so long sessions at high brightness add the most wear. Lower brightness helps.
Mid grey keeps each subpixel in its sensitive range, so small differences show.
Other bench tools
White Background Generator
PNG, JPG or WEBP at any size, plus a five-size batch for marketplaces.
Monitor Calibration
The near-white patches I use before I trust a screen with an edit.
Dead Pixel Test
Eight flat fields to rule out the monitor before blaming the sensor.
Screen Resolution Checker
Real pixels and pixel ratio, so exports match the screen.
Refresh Rate Test
Checks the frame rate your tethering laptop actually runs.