Brother DCP-8155DN - Manual (Page 181)

Scanning
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 Duplex (For DCP-8155DN, MFC-8910DW and MFC-8950DW(T)): Check this box when using duplex
scan feature from Document Feeder.
 Scan To: Choose the destination folder or destination application.
 Name: Enter the prefix text used for the name of the scanned image.
 Format: Select the file format of the scanned data.
 Combine into single document (Mac OS X 10.7.x): When you choose PDF or TIFF for the file
format, check this box to scan a document as one item and saved as one file.
 Image Correction: From the manual setting you can adjust Brightness, Contrast (Mac OS X 10.7.x
only), Tint, Temperature, Threshold and Saturation.
f Click on Scan to start scanning.