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Specifies the types of page boundaries. See PDF specification for details.
ArtBox: 4;
The extent of the pages meaningful content (including potential white space) as intended by the pages creator.
BleedBox: 2;
The region to which the contents of the page should be clipped when output in a production environment.
CropBox: 0;
The region to which the contents of the page are to be clipped (cropped) when displayed or printed.
MediaBox: 1;
The boundaries of the physical medium on which the page is to be printed.
TrimBox: 3;
The intended dimensions of the finished page after trimming.