Brightness adjustment of the screen.
I wrote the sign of ABC in upper 2 frames.
When you cannot confirm a sign of the right side.
Because the screen is dark, please adjust it brightly.
When you can confirm a sign of the left side.
Because the screen is bright, please adjust it darkly.
The ideal adjustment points.
Places where the left signature can disappear
where you can confirm the right signature faintly.
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