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I/O Checkup
System ready

Edge Touch Test

Test touchscreen corners and bezels for edge detection, missed taps, and weak contact zones.

Touch every edge marker
TLTopTRRightBRBottomBLLeft
Active Points0
Max Multi-Touch0
Last InputNone
PressureUnavailable
Edge Coverage0%
Run NotesUse real touchscreen hardware for the most meaningful result. Mouse input is only a fallback.

Local history

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How to use this test

What to do

Touch each highlighted marker near the edges of the field. Fullscreen gives you a larger test area.

What to look for

System navigation gestures and palm rejection can intercept touches near the edge. Retest an unresponsive area.

Contact positions, identifiers, and pressure come from Pointer Events where available. Pressure may be a default value on unsupported hardware. Browser gestures and palm rejection can interrupt contact tracking.