Quick links to procedures on this page:
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Open Prepress Interface (OPI) lets you use low-resolution images as placeholders for the high-resolution images that appear in your final work. When a print provider receives your file, the OPI server substitutes the low-resolution images with the high-resolution images.
Printers’ marks provide information to the print provider about how the work should be printed. You can specify which printers’ marks to include on the page. The available printers’ marks are as follows:
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Crop marks — represent the size of the paper and appear at the corners of the
page. You can add crop marks to use as guides in trimming the paper. If your
output has multiple pages per sheet (for example, two rows by two columns), you
can add the crop marks on the outside edge of the page so that all crop marks are
removed after the cropping process, or you can choose to add crop marks around
each row and column. A bleed determines how far an image can extend beyond the
crop marks. A bleed requires that the paper you are printing on is larger than the
size of paper you ultimately want, and the image area must extend beyond the edge
of the final paper size.
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Registration marks — are required to line up the film, analog proofs, or print
plates on a color press. Registration marks print on each sheet of a color separation.
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Densitometer scale — is a series of gray boxes ranging from light to dark. These
boxes are required to test the density of halftone images. You can position the
densitometer scale anywhere on the page. You can also customize the levels of gray
that appear in each of the seven squares on the densitometer scale.
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File information — can be printed, including the color profile; name, date, and
time the image was created; and page number.
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| To maintain OPI links in a PDF file | |
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Click File  Export.
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Choose PDF - Adobe Portable Document Format from the Save as type list
box.
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Locate the folder in which you want to save the file.
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Type a filename in the File name box.
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Click Export.
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The PDF settings dialog box appears. |
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Click the Prepress tab.
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Enable the Maintain OPI links check box.
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Don’t use OPI links if you are not sure whether your PDF file is destined for
an OPI server.
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| To include printers’ marks in a PDF file | |
1. |
Click File Export.
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2. |
Choose PDF - Adobe Portable Document Format from the Save as type list
box.
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Locate the folder in which you want to save the file.
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Type a filename in the File name box.
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Click Export.
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The PDF settings dialog box appears. |
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Click the Preflight tab.
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Enable any of the following check boxes:
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Crop marks
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File information
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Registration marks
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Densitometer scales
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If you want to include a bleed, enable the Bleed limit check box, and type a bleed amount in the corresponding box. |
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Usually, a bleed amount of 0.125 to 0.25 inch is sufficient. Any object
extending beyond this amount uses space needlessly and may cause problems
when you print multiple pages with bleeds on a single sheet of paper.
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