A Note on Printing Services

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A thorough treatment of professional printing is far beyond the scope of this book. However, here are a few things you should know if you want to send your images to a printing service:

• Some printing devices measure resolution in lines per inch, and this resolution measure is called the screen frequency. The resolution of your images should typically be about one and a half to two times the particular device's screen frequency, but check with your printer to be sure.

• Flatten any layered image before sending it to a print service.

• Choose a file format that is generally used for printed images. Tagged Image File Format (TIFF) is common, but you should check with your print service to see what its needs are. Whatever the file format, be sure that your image is saved in the format's uncompressed mode (or at the lowest level of compression if there is no uncompressed mode).

• If the print service requires Cyan-Magenta-Yellow-Kohl (CMYK) color separations for your image, you can print them by choosing CMYK Separations in the Print Setup dialog box available in Print Layout ( F ile > Print Set u p).

Be sure to consult your particular printing service to see what its requirements and recommendations are.

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