You can adjust the
brightness of darker and brighter areas of the image by adjusting
the Offset and Gain settings for the individual image
colors.
Turn on the projector and
display an image.
Press the Settings button.
Select the Image menu and press Enter.
You see a screen like this:
Select the Color > White
Balance > Custom
setting and press Enter.
Do the following as
necessary for each color (Red, Green, and Blue):
To adjust the brightness of dark areas,
adjust the Offset setting.
To adjust the brightness of bright areas,
adjust the Gain setting.
Higher values will make the image brighter but can decrease shading
details, while lower values will make the image darker but can
increase the visibility of details.
Press the Settings button to exit
the menu or the Esc button to return to the
previous screen.