Correcting The Shape Of A Keystoned Image - Christie 4K40-RGB User Manual

Pressing Func+Help on the IR remote keypad disables all geometry corrections (warping,
keystone, and black level blending) without changing the settings associated with them.

Correcting the shape of a keystoned image

Keystone effect occurs when you project an image onto the screen at an angle and the projector is not
centered on the screen. The image appears distorted and resembles a trapezoid.
To correct the shape of a keystoned image, use the keystone options available in the geometry
correction menu. Perform coarse keystone adjustments by using the horizontal or vertical settings. It
may not be possible to match the screen dimensions with the horizontal and vertical keystone controls
but you can refine these settings by adjusting the 2D keystone settings.
Enabling keystone adjustments
Enable keystone corrections to correct the shape of a keystoned image.
1. Select MENU > Configuration > Geometry Correction > Geometry Correction Mode.
2. Select Keystone.
Any keystone adjustments previously set are enabled.
To disable keystone adjustments, select MENU > Configuration > Geometry Correction >
Geometry Correction Mode > Off.
Adjusting the image with 2D keystone
2D keystone distorts the projected image both vertically and horizontally simultaneously and
resembles a trapezoid.
Adjusting horizontal or vertical keystone correction after 2D keystone erases the 2D keystone settings;
however, performing 2D keystone after horizontal or vertical correction retains the previous keystone
setting.
1. Select MENU > Configuration > Geometry Correction > Geometry correction Mode.
2. Select 2D Keystone Correction.
3. From the correction dialog, select the corner to adjust.
4. To make the keystone adjustments, use the arrow keys to change both the vertical and
horizontal values.
5. Select Apply Changes.
Adjusting vertical keystone
Use vertical keystone to correct a keystoned image shape in which the top and bottom borders of the
image are unequal in length, and both sides of the image are inclined toward the top or bottom edge.
If vertical keystone adjustments have been made, starting horizontal keystone adjustments erases the
vertical settings.
4K40-RGB User Guide–D4K40-RGB, Roadie 4K40-RGB
020-102958-05 Rev. 1 (04-2020)
Copyright © 2020 Christie Digital Systems USA, Inc. All rights reserved.
Adjusting the image
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