Reflecta x44-Scan Bedienungsanleitung Seite 34

Press "OK" to enter the EV and RGB menu for exposure control and color
correction.
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Use or button to select, then press 'OK' to confirm.
The selected settings bar will be displayed on the preview image. Set your
desired value for Brightness, Red, Green, or Blue and confirm by pressing 'OK'
Select the RESET option to return to the default values.