This palette can only be used in Extended mode.
This palette is used for booklet imposition types. It sets how many folded sheets are inserted into each other – if all of them, the option is disabled. If sheets are not inserted into each other, the amount of sheets in a folder is set to 1. It also affects paper thickness correction which is calculated from start in the beginning of each folder. It is also active during Cut & Stack even though it makes little sense in this case. In standard N-UP imposition it does not affect page assignment (it only affects paper thickness correction).