What is the behavior of the different page boxes in Imaging Engine?
This article explains what each bounding box in a PDF document is for and how they are used by Imaging Engine.
What is each page box for?
The role of each page box is as follows (the following descriptions are adapted from the ISO PDF specification, ISO 32000-1):
Defines the boundaries of the physical medium on which the page is intended to be displayed or printed.
When the page is displayed or printed, its contents are clipped (cropped) to this rectangle and then imposed on the output medium.
Defines the region to which the contents of the page should be clipped when output in a production environment.
Defines the intended dimensions of the finished page after trimming.
Defines the extent of the page’s meaningful content (including potential white space) as intended by the page’s creator.
What if a page box is not defined in a PDF file?
Not all page boxes have to be defined in a PDF file. The only one that always has to be defined is the MediaBox. The others can adopt default values as follows:
If the CropBox is not defined, its value is taken to be the same as the MediaBox.
If the BleedBox is not defined, its value is taken to be the same as the CropBox.
If the TrimBox is not defined, its value is taken to be the same as the CropBox.
If the ArtBox is not defined, its value is taken to be the same as the CropBox.
What happens when I RIP a file in Imaging Engine?
The dimensions of the output files produced correspond to the page box selected in the Imaging Engine parameters, however, the page content is always clipped to the CropBox. This behavior is in accordance with the ISO PDF specification.
Difference with FlexRip/NexusRip
The difference with FlexRip/NexusRip is explained in this KB article: