Canon WUX450 User Manual page 159

Here, you can use the following settings in the edge blending menu.
Black level Adjust the black level of non-overlapping image areas.
adjustment
Off
Adjust
Adjustment
type
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.
Installation-Related Menu Settings
Black
level
D-area base Adjust the area D black level.
D-area red
D-area green Adjust the green component of the
D-area blue
159
Adjust the red component of the
area D black level.
area D black level.
Adjust the blue component of the
area D black level.