NEC PA1004UL-B User Manual page 138

NOTE:
• When power is supplied to the device, the adjustment value of the [KEYSTONE] used previously is retained even if the gradient of
the device is changed.
• As electrical correction is carried out by [KEYSTONE], the brightness may be reduced or the screen quality may deteriorate sometimes.
CORNERSTONE
Display the 4-point correction screen and adjust the trapezoidal distortion of the projection screen.
Please refer to "Correcting Horizontal and Vertical Keystone Distortion [CORNERSTONE]" (→ page
45) for details on the operation.
HORIZONTAL CORNER/VERTICAL CORNER
Distortion correction for corner projection such as wall surfaces.
HORIZONTAL CORNER
VERTICAL CORNER
NOTE:
• When the maximum adjustment range is exceeded, distortion adjustment is disabled. Set up the projector at an optimal angle as
the deterioration in the image quality increases as the distortion adjustment volume gets larger.
• Please note that the image will go out of focus due to the difference in the distance between the upper and lower or left and right
sides and the center of the screen for projections cutting across corners. Lenses with short focal points are also not recommended
for projections cutting across corners as the image will go out of focus.
Performs correction for projection onto a wall lying at an angle to the horizontal direction.
* Reverse angle correction is also possible.
Performs correction for projection onto a wall lying at an angle to the vertical direction.
* Reverse angle correction is also possible.
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5. Using On-Screen Menu