files for a service bureau
Interface (OPI) lets you use low-resolution images as placeholders for the
high-resolution images that appear in your final work. When a service bureau
receives your file, the OPI server substitutes the low-resolution images for the
Document settings can
be preserved to maintain how a PDF file looks. You can preserve document
overprints and halftone screen information.
If you have spot
colors in your file, you can choose either to preserve the spot colors or to
convert them to process colors so that the file produces four plates for CMYK
provide information to the service bureau 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:
• 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.
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.
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.
• File information
— can be printed, including the color profile; name, date, and time the
image was created; and page number.