Brother MFC-7240 - Manual (Page 122)

Scanning
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Settings in the Scanner window
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Resolution
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You can change the scanning resolution from the Resolution pop-up menu. Higher resolutions take more
memory and transfer time, but produce a finer scanned image. The following table shows the resolutions you
can choose.
Scan Type
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 Black & White
Use for text or line art images.
 Gray (Error Diffusion)
Use for photographic images or graphics. (Error Diffusion is a method for creating simulated gray images
without using true gray dots. Black dots are put in a specific pattern to give the gray appearance.)
 True Gray
Use for photographic images or graphics. This mode is more exact because it uses up to 256 shades of
gray.
Document Size
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Choose one of the following document sizes:
 A4 8.3 x 11.7 in
 JIS B5 7.2 x 10.1 in
 JIS B6 5 x 7.2 in
 Letter 8.5 x 11 in
 Legal 8.5 x 14 in
 A5 5.8 x 8.3 in
Resolution Black & White/
Gray (Error Diffusion) True Gray
100 x 100 dpi Yes Yes
150 x 150 dpi Yes Yes
200 x 200 dpi Yes Yes
300 x 300 dpi Yes Yes
400 x 400 dpi Yes Yes
600 x 600 dpi Yes Yes
1200 x 1200 dpi Yes Yes
2400 x 2400 dpi Yes Yes
4800 x 4800 dpi Yes Yes
9600 x 9600 dpi Yes Yes
19200 x 19200 dpi Yes Yes