[Detailed Settings] Dialog Box ([Finishing] Tab)

Enables you to set the binding location and width when printing a combination of pages with different sizes and/or print orientations.
Descriptions under [Finishing] Tab (Settings)

Descriptions of Settings

[Mixed Paper Sizes]
Enables you to select the combination of paper sizes.
[Paper Alignment]
Enables you to select the binding location.
[Gutter]
Enables you to set the gutter width.