Hi PK88.
To adjust the brightness and contrast of scanned documents, you will need to use the ScanGear MF driver. Please follow the instructions below:
NOTE: PDF is used as the format in this example.
To access this driver, please follow the steps below:
1. Verify that MF Toolbox is closed on the computer and press the [SCAN] button on the printer.
2. Highlight [Remote Scanner] and press [OK]. The screen will show, "Remote Scanner. Waiting online...".
3. On the computer, open the MF Toolbox and select [PDF].
4. In the [PDF] window, click the check box for "Display the Scanner Driver"
5. Click [Apply] at the bottom of the window.
6. Click the green [START] button on the [PDF] window. The ScanGear MF driver will open.
7. Click the [Advanced Mode] tab.
Once [Advanced Mode] is open, you can adjust the brightness and contrast of a document by clicking on the [Brightness/Contrast] icon. The icon resembles a half-white, half-black sun. You may need to adjust these settings a few times to get the image quality that you prefer.
More information about the ScanGear MF tool can be found in the e-Manual that came with the machine. It will be on the User Manuals CD-ROM. If you are still unable to access this information, the e-manual is available for download at the Canon USA website.
If you have any other questions, or need immediate assistance, please call us at 1-800-OK-CANON (1-800-652-2666).