Since spacing is defined between rows and columns, for this matter you will need to have same-up custom defined and to have trim marks also set. The spacing in a JDF ticket it is identified by the attribute Gutter, which is found in the LayoutPreparationParam JDF Element.
In order to fulfill a custom spacing request, you need a combination of same-up custom and trim marks set.
In the following JDF ticket you can see a custom a custom gutter being described.
Example:
<LayoutPreparationParams Class="Parameter" ID="r200520111545.901_000013" NumberUp="2 2" Status="Available" StepRepeat="2 2 1" Gutter="10 20" > <GeneralID IDUsage="oce:RowsSelection" IDValue="First"/> <GeneralID IDUsage="oce:ColumnsSelection" IDValue="Last"/> <GeneralID IDUsage="oce:RowsOrientation" IDValue="Rotate180"/> <GeneralID IDUsage="oce:ColumnsOrientation" IDValue="Flip180"/> <FitPolicy SizePolicy="ClipToMaxPage"/> <PageCell> <ImageShift PositionX="Center" PositionY="Center" ShiftBack="0 0" ShiftFront="0 0"/> </PageCell> </LayoutPreparationParams>