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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Click File  Publish to PDF. |
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The PDF settings dialog box appears. |
Don’t use OPI links if you are not sure whether your PDF file is destined for an OPI server.
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Click File Publish to PDF. |
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The PDF settings dialog box appears. |
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.
The features documented in the Help are available in the full version of CorelDRAW Graphics Suite 2019. Some features may not be available in this version of the product.
