Previous Next

                                         1127
S E C T I O N H .3                                              Implementation Notes



         during printing. Although these options have varied from one Acrobat
         version to another, the default behavior is as follows:
          1. Select the media size and orientation according to the operating sys-
             tem’s Print Setup dialog. (Acrobat has no direct control over this pro-
             cess.)
          2. Compute an effective crop box by clipping it with the media box and
             rotating the page according to the page object’s Rotate entry, if speci-
             fied.
          3. Center the crop box on the medium, rotating it if necessary to enable
             it to fit in both dimensions.
          4. Optionally, scale the page up or down so that the crop box coincides
             with the edges of the medium in the more restrictive dimension.
         The description above applies only in simple printing workflows that lack
         any other information about how PDF pages are to be imposed on the
         output medium. In some workflows, there is additional information, ei-
         ther in the PDF file (BleedBox, TrimBox, or ArtBox) or in a separate job
         ticket (such as JDF or PJTF). In these circumstances, other rules apply,
         which depend on the details of the workflow.
         Consequently, it is recommended that PDF files initially be created with
         the crop box the same as the media box (or equivalently, with the crop box
         omitted). This ensures that if the page is printed on that size medium, the
         crop box coincides with the edges of the medium, producing predictable
         and dependable positioning of the page contents. On the other hand, if the
         page is printed on a different size medium, the page may be repositioned
         or scaled in implementation-defined or user-specified ways.


10.10.4, “Output Intents”
168. Acrobat viewers do not make use of the “to CIE” (AToB) information in an
     output intent’s ICC profile.
169. Acrobat 5.0 does not make direct use of the destination profile in the out-
     put intent dictionary, but third-party plug-in extensions might do so. Ac-
     robat 6.0 does make use of this profile.

Previous Next