Canon imageFORMULA R40 User Manual page 56

Hint
In Windows 8.1, it is registered at the following location.
2
Click the [Maintenance] tab and then move the slider to
change the value of [Reduction ratio adjustment].
The adjustment value can be set within the range from -3.0% to
3.0%.
3
Click [Apply].
4
Click [Close] to close the imageFORMULA Driver Setting
Tool.
1
Open the scanner driver's Detail Settings screen.
p. 32)
2
Click to display the [Scanner Information] dialog box.
56
(See