BoundingBox
The BoundingBox comment is used in DSC to indicate where the actual image
will be on a page. The comment describes a rectangle which completely encloses
the image. The form of the comment is:
%%BoundingBox: llx lly urx ury.
For instance, suppose I have an image which extends from x=72
to x=144 and from y=150 to y=170. The BoundingBox
comment in the document should then be: %%BoundingBox: 72 150 144 170