ViewSonic M2 User Manual page 68

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Keystone
Description
Adjust trapezoidal screen image distortion.
Auto V Keystone
Provides a rectangular screen image by automatically
adjusting the keystone number when there is a
trapezoidal screen image caused by the tilting of the
projector.
• Enable: Automatically adjust the keystone number.
• Disable: Manually adjust the keystone number.
H/V Keystone
Keystone can be adjusted manually.
4 Corner Adjustment
Adjust each corner individually for maximum
projection flexibility.
NOTE: 4 Corner Adjustment is available only
when H/V Keystone is Off.
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