QuickShow FB3-QS User Manual page 24

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Note that with all of this flexibility, you can adjust the preview window for each zone to truly simulate
what the show will look like in the final venue.
-Beam Attenuation Map section
The next section shows the Beam Attenuation Map section for the selected zone, and allows you to
adjust it. The Beam Attenuation Map allows you to control the brightness of the beam over the entire
projection zone and allows non-uniform brightness maps.