This check is useful when setting up a new monitor, looking over a used screen, or deciding whether a picture adjustment changes how the display looks. For a fair comparison, settle into a comfortable viewing position and avoid changing multiple display settings while checking a pattern.
How to use Gamma Test
- Select Pattern mode or Gamma references, then choose Start Test to begin viewing the pattern in fullscreen.
- Compare the alternating black-and-white lines with the solid gray references from a comfortable distance at native zoom.
- Choose Previous or Next to move between patterns. On a keyboard, use Left or Right for the same navigation.
- Press Space to switch automatic mode on or off. If reduced motion is enabled, progression stays manual.
- Choose Reset or press R to reset. Press F to enter or exit fullscreen, or press Escape or choose Exit fullscreen to leave it. In fullscreen on a phone, tap the left or right half to move between patterns; an Exit button stays on screen.
When to use it
- Checking a new monitor: Look for an unexpected difference in the reference pattern while you can still follow up with the seller.
- Inspecting a used display: Give the screen a quick visual check before buying, then investigate any concern with a suitable diagnostic method.
- Comparing picture settings: See whether a gamma or related display adjustment visibly changes the line-and-gray appearance.
- Reviewing a picture-mode change: Check the screen again after switching modes to understand the visible effect.
- Comparing two displays: View the same pattern on each screen with zoom and settings as consistent as possible.
- Learning what gamma references look like: Observe how alternating lines appear alongside solid gray areas without relying on a numeric result.
- Choosing a next check: Use the pattern as an initial visual check before exploring other monitor test patterns.
Tips for a clearer comparison
Use native zoom and a comfortable viewing distance, as the on-page guidance recommends. Keep the viewing position and display setup steady when moving between patterns; a change in angle can make the comparison look different.
Check one setting at a time. If you adjust several picture controls between views, it can be difficult to tell which change affected the appearance. A close visual match is a reference point, not proof that a display is correctly calibrated.
Stop if bright patterns cause discomfort. If you want to explore other visual checks after this one, try the Monitor Test.
Limits of Gamma Test
Gamma Test is a subjective visual reference, not a calibrated measurement. It does not provide a numeric gamma result or determine by itself whether a screen is faulty.
Scaling, antialiasing, dithering, and viewing angle can invalidate the comparison. A mismatch may have several causes, so repeat the check under consistent conditions rather than treating one view as a diagnosis. For measured color accuracy, use a hardware calibrator with suitable calibration software; for a suspected physical fault, another diagnostic approach or the manufacturer’s support may be more appropriate.