Simple imposition schemes

This page applies to Harlequin v13.1r0 and later; both Harlequin Core and Harlequin MultiRIP.

A number of basic imposition designs are provided with the RIP as shipped; these are referred to as schemes.

The following schemes are provided within the procset:

Scheme name	Description
`OneUp_1s_1`	Single-side, one page per sheet
`OneUp_2s_1`	Two-sided, one page per sheet surface
`NUp_1s_1`	Single-sided, each sheet surface containing a grid of pages, all at the same orientation. This can be used for laser printer N-Up printing, and for media saving. The number of pages in the grid can be set manually or can be calculated automatically for best fit. In conventional print, it can also be used for two-sided printing using either `Work&Turn` or `Work&Tumble` (depending on plate orientation in the press) for two-up sheets that are cut to produce single-sheet, unbound jobs.
`NUp_2s_1`	Double-sided, each sheet surface containing a grid of pages. Intended mainly for laser print and for media saving for unbound jobs in conventional print. Note that neither of the NUp schemes provide support for generalized conventional imposition; they all take pages in reader order from the supplied content file, rather than taking pages out of order as is required for perfect binding and so on.
`StepRepeat_1s_1`	Single-side, multiple copies of the same page are imposed in a grid
`StepRepeat_2s_1`	Two-sided, multiple copies of the same page are imposed in a grid. This differs from the single-sided variant principally in allowing different sheet margins, slug lines, and so on, or the front and back of the sheet.
`SaddleStitch_2`	Two-up Saddle-stitched production. Sheets are gathered after printing, then folded and trimmed to produce booklets. Binding side is defined by the `BindingEdge` parameter.
`SaddleStitch_SR_2`	Step and repeat of Saddle-stitched page pairs. This variant places one or more identical copies of each booklet side by side on the sheets. Sheets are cut before gathering, then folded and trimmed to produce booklets. Binding side is defined by the `BindingEdge` parameter.
`CutStack_1s_1`	Single-sided, Two-Up imposition for jobs that are bound with wire, comb binders, and so on, and therefore are trimmed to single pages. Once printed and stacked, each set of sheets is cut, and one half stacked on top of the other to give a full set of pages in order.
`CutStack_2s_1`	As CutStack_1s_1, but for two-sided work
`SaddleStitch_4Up _2`	Saddle-stitch printed four up and folded once before gathering and saddle-stitching `BindingEdge`, `SpineFold`, and `Geometry` define the layout on the sheet.
`FourUp_Perfect_2`	Four-up printing for perfect binding. `BindingEdge`, `SpineFold`, and `Geometry` define the layout on the sheet.

Imposition schemes

Of these, only OneUp_1s_1 and NUp_1s_1 may be used when processing PostScript language files. PDF files may be submitted to any scheme, and single page formats such as TIFF, EPS, and JPEG may be submitted to any scheme, but only really make sense for use with OneUp_1s_1 and StepRepeat_1s_1 ; all others are intended to be applied to multiple pages.

When simple imposition is called using the PostScript API, new schemes may be added to the RIP by creating new files in the SW/Usr/HqnLayout/Schemes directory. The format and contents of those files is not publicly documented at this time; please enquire through the Harlequin RIP Support group if you need to develop new schemes. New schemes added in this way do not appear in the user interface.