Brother MFC 9840CDW - Manual (Page 83)

ControlCenter3
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3
Scan to E-mail
3
General tab
To create the button name, enter a name in the Please enter a name for the Custom Button text field
(up to 30 characters).
Choose the type of scan from the Scan Action field.
Settings tab
Choose the E-mail Application, File Type, Resolution, Scan Type, Document Size,
Duplex (two-sided) Scanning (if necessary), Show Scanner Interface, Brightness and Contrast
settings.