Canon WX450ST User Manual page 163

Here, you can use the following settings in the edge blending menu.
Black level
adjustment
2
Select [Adjustment type] > [Black level].
3
Select [D-area base], and use the remote's [ ] [ ] buttons to adjust the
values for area D.
As you watch the image, adjust the values so that the brightness and colors of
the blending area and area D match. Adjust [D-area base] to lighten the black
level, and adjust [Red], [Green], and [Blue] to obtain an optimal black level
color tone, as needed.
4
Repeat this adjustment on all projectors.
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Adjust the black level of non-overlapping image areas.
Off
Adjust
Adjustment Black
type level
Installation-Related Menu Settings
D-area base Adjust the area D black level.
D-area red Adjust the red component of the
area D black level.
D-area green Adjust the green component of the
area D black level.
D-area blue Adjust the blue component of the
area D black level.
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