Bleed is page margin, which will be cut off. When the resulting printed product should be printed to paper margin, it is necessary to continue drawing even for future cut – because of inaccuracies in printing and cutting on some of the pages could be white edge.

Trim box (finished size) determines where will be the resulting printed matter cut. Trim box of the resulting sheet is an area defined by the upper-left corner of the first position and the lower-right corner of the last position (i.e. contains all positions of the sheet).

Untrimmed size, Bleed box of the resulting sheet is larger (or equal) then trim box. It can be used for bookbinding, which according to him can cut the resulting sheet, process it (folding, sewing, etc.) and then cut to finished size. Can be set to bleed or customized as needed.

Kind of imposition is explained in more detail in the chapter Imposition types.

Imposition margin is the area designated for the placement of marks (trim marks, registration marks, sheet descriptions etc.) and bleeds. Its size is calculated automatically according to either bleed and marks, or is entered manually. If it is set to automatic sheet size, sheet is set exactly to the edge of the imposition. If the sheet size is set manually, may be the actual margin of the sheet (the distance between the trim box and the sheet end) greater depending on the size and alignment sheet.

Gaps between rows and columns are necessary in the event that the resulting printed matter is printed to the edge. At zero gaps in the event of different graphics (e.g. background color) of the pages would mean that after cutting at the edge of some of the pages could be the graphic of the secondary page (due to inaccuracies in cutting and printing, see bleed).

Sheet, sheet size is size of the resulting sheet (resulting PDF page size). If it does not fit imposition, his display is highlighted.

Imposition size is part of the sheet, which occupies the imposition (including imposition margins for marks).

Position is part of the imposition, on which are pages placed. Positions are organized into rows and columns, like a table cell.

2-UP (or more) the same page is printing the page (or several pages) placed multiple times on a single sheet. It can be done either by specifying pages repetition or can be placed one page on more positions (e.g. by dragging from the Palette Pages for Imposition). Those two do not mix! To be placed on a sheet multiple times a group of pages (e.g. booklet is the first and last page next to each other), can usually this function easily realized by choosing Edit / Duplicate imposition below (side by side).