Nexigo PJ10 Mode D'emploi page 9

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PROJECTOR DISTANCE & SIZE
176"
140"
104"
86"
42.5"
4.3 8.2 9.8 13.1 16.4
（ft）
Note: Due to manufacturing tolerances there will be variances of
about 3% from unit to unit. The above data is for reference only.
Please use actual measurements when installing the device.
KEYSTONE CORRECTION
Keystone correction, also known as keystoning, refers to adjusting
the image of a projector that is displaying an angled image. This is
often an issue when mounting a projector, as it often will be mounted
above or below the horizontal center line of the screen. This will
mean that the image will be displayed on the screen at an angle
and this will change the shape of the image to a trapezoid instead
of a rectangle. To correct this, please attempt: Please use the
Keystone Adjustment knob to adjust the vertical keystone if the
projection image shows up tilted, as shown below.
KEYSTONE
US 08