ViewSonic VS18991 User Manual page 50

4k ust smart laser projector
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Menu Option
Description
4 Corner
Enable/Disable 4 Corner Adjustment.
Keystone
4 Corner Adjustment
Adjust each corner individually for maximum projection
flexibility.
Configure the geometric distortion of the projector's
images when the images are projected onto screens
which have a kind of uneven surface such as a cylinder, a
Warping
spherical shape, etc.
NOTE:  4 Corner Adjustment will be disabled if Warping
is enabled.
Information
Shows Input Source, Resolution, 3D format, and HDR.
50

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