Konica Minolta magicolor 1690MF Reference Manual page 109

Scale
Shows the width and height of the area to be scanned.
If the resolution is set at 1200 × 1200 dpi or higher, a setting larger
than 100% cannot be specified.
Scanning Mode
Select Auto or Manual. When Manual is selected, settings can be speci-
fied for Brightness/Contrast, Filter, Curves, Levels, Color Balance
and Hue/Saturation.
The parameters that can be set differ depending on the scanning
mode that is selected.
If Auto is selected as the scanning mode, scanning from the original
glass is performed after a prescan is performed so that a preview
image can be checked.
Image size
Shows the data size of the scan image.
Rotation
The TWAIN driver support 4 kinds of rotation type: None, Right 90, Left
90, 180.
Close
Click to close the TWAIN driver window.
Prescan
Displays a preview in the preview window.
Scan
Click to begin scanning.
AutoCrop
Selects an area of the scanned image.
Zoom
Zooms in on the scanned image.
Mirror
Displays a mirror image of the preview image.
Tone Reversal
Reverses the colors of the preview image.
Clear
Erases the preview.
Before/After (RGB)
Move the pointer in the preview window to display the color tones at the
pointer's position before and after adjustments.
1-86 Specify the Scan Settings