5/6/2023 0 Comments Pdfinfo source![]() Figure 86 illustrates the relationships among these boundaries. ![]() If they do, they are effectively reduced to their intersection with the media box. The crop, bleed, trim, and art boxes shall not ordinarily extend beyond the boundaries of the media box. All of them are rectangles expressed in default user space units. The page object dictionary specifies these boundaries in the MediaBox, CropBox, BleedBox, TrimBox, and ArtBox entries, respectively (see Table 30). The default value is the page’s crop box. The art box (PDF 1.3) defines the extent of the page’s meaningful content (including potential white space) as intended by the page’s creator. It may be smaller than the media box to allow for production-related content, such as printing instructions, cut marks, or colour bars. The trim box (PDF 1.3) defines the intended dimensions of the finished page after trimming. The actual printed page may include printing marks that fall outside the bleed box. This may include any extra bleed area needed to accommodate the physical limitations of cutting, folding, and trimming equipment. The bleed box (PDF 1.3) defines the region to which the contents of the page shall be clipped when output in a production environment. The default value is the page’s media box. However, in the absence of additional information (such as imposition instructions specified in a JDF or PJTF job ticket), the crop box determines how the page’s contents shall be positioned on the output medium. Unlike the other boxes, the crop box has no defined meaning in terms of physical page geometry or intended use it merely imposes clipping on the page contents. The crop box defines the region to which the contents of the page shall be clipped (cropped) when displayed or printed. Content falling outside this boundary may safely be discarded without affecting the meaning of the PDF file. It may also include areas close to the edges of the medium that cannot be marked because of physical limitations of the output device. It may include any extended area surrounding the finished page for bleed, printing marks, or other such purposes. The media box defines the boundaries of the physical medium on which the page is to be printed. To handle such cases, a PDF page maydefine as many as five separate boundaries to control various aspects of the imaging process: The intermediate page may often include additional production-related content, such as bleeds or printer marks, that falls outside the boundaries of the finished page. In the latter case, it is important to distinguish between the intermediate page and the finished page. Source : Adobe ISO 32000-1:2008 Specification 14.11.2 Page Boundaries 14.11.2.1 GeneralĪ PDF page may be prepared either for a finished medium, such as a sheet of paper, or as part of a prepress process in which the content of the page is placed on an intermediate medium, such as film or an imposed reproduction plate. PDF specification ISO 32000-1:2008 as published by Adobe Producer: Acrobat Distiller 3.0 for Power Macintosh On Linux, you can check the values with pdfinfo in the poppler package with the -box option. The poppler package has the capability also, for example, pdftops crops to the CropBox by default but has a -nocrop option to use the MediaBox instead. Some viewers like "gv" have an option to let you override the displayed area. Here are a few links to pages illustrating the boxes with images.įor a detailed description of these boxes, see, or the ISO definition of these boxes that follow, further down in that page.
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