Brother ADS-2400N - Manual (Page 166)

Scan Using Your Computer
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9 Combine into single document
Check this box to scan a document as one item and save it as one file when selecting PDF or TIFF for the
file format.
10 Image Correction
You can configure settings depending on the Kind that you have chosen.
Kind Configurable Settings
Color Brightness, Tint, Temperature, Saturation
Black & White Brightness, Contrast
Text Threshold