Brother MFC 9840CDW - Manual (Page 196)

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10
Scan to OCR
10
General tab
Enter a name in Name for Custom (up to 30 characters) to create the button name.
Choose the type of scan from the Scan Action field.
Settings tab
Choose the Target Application, File Type, OCR Software, OCR Language, Resolution, Scan Type,
Document Size, Duplex (two-sided) Scanning (if necessary), Show Scanner Interface, Brightness
and Contrast settings.