Canon imageFormula DR-C225 User Manual page 84

(1) When you want to specify different scanning conditions for the front
and back pages of a document, select [Skip Blank Page] or [Both] for
[Scanning Side] on the [Basic] tab in advance.
(2) Specify the number of scanning conditions to apply in [Stream count
of Front]. Up to three can be specified.
(3) Select [Front 1st], and then open the other tabs and set the scanning
conditions. Depending on the value specified for [Stream count of
Front], configure the remaining [Front 2nd] and [Front 3rd] in the
same way.
(4) When specifying the scanning conditions of the back, configure the
settings in the same way as described in (1) to (3). In this case,
specify [Stream count of Back], and then set the scanning conditions
for each of [Back 1st] to [Back 3rd].
The following shows the setting conditions that can be set in the
multistream settings.
Tab
[Basic] tab [Color mode] and [Dots per inch] (excluding
[Detect automatically] for both)
[Brightness] tab [Brightness] and [Contrast]
[Image processing] tab [Edge emphasis], [Color drop-out] and
[Character Emphasis]
[Feeding] tab None (all disabled)
[Others] tab None (only [Use MultiStream] is enabled)
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Items that can be set