Open Prepress Interface (OPI) lets you use low-resolution images as placeholders for the high-resolution images that appear in your final work. When your service bureau receives your file, the OPI server substitutes the low-resolution images for the high-resolution images.
1 Choose File, Publish To PDF.
2 Click the Advanced tab.
3 Enable the Maintain OPI Links check box.
• If you are not sure whether your PDF file is destined for an OPI server, avoid using OPI.
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