practice, for any image file format, should choose the "Print" mode will be your default printer Acrobat Distiller, according to the needs of different applications, a variety of custom precision and PDF files of all sizes. Generally speaking, "screen optimize" (screen optimized) for the Web browser, the option to use compression, to reduce the pixel sampling and the ways to reduce the resolution to create the PDF file as small as possible.

"Print optimize" (print optimized) to get color proofs for desktop printers, digital copiers, as well as CD ROM publications. "Press optimize" (published in Optimization) for output to image Imagesetter or plate-making machine to prepare the printing precision, the option to reduce the pixel sampling 300 dpi color and grayscale processing bitmap images to 1200 dpi monochrome image processing, the largest the limits of the original document to retain all the information.

where a printing plant by the machine in the Apple ads with Photoshop-like production, layout size of 20.4cm ¡Á 28.0cm, in cmyk mode tif file 31.2Mb, the Distiller print resolution is set to 300 dpi, other set to the default, you can output the following several picture:

1) screen mode file compression to 303Kb, suitable for online document proofreading;
2) Print mode file compression to 7.03Mb, to meet the requirements of desktop publishing;
3) Press file compression mode to 12.4Mb, compression ratio reached 40%, completely replace the original tif for precision printing. Practice, I will 303Kb proof of the PDF as a distribution to advertisers proofing, fully validated to meet the needs of customers. By another advertiser cdr produced by advertising Coreldraw picture, the original has 9.8Mb, with the disk to send and e-mail sent are not very convenient, I asked the compressed PDF files, respectively, after the customer into a 1.02Mb and 2.4 Mb of the PDF document sent to the printing plant as the production of 2 pages of color effects are strong in the remake of the original print produced by the effect of color pages.

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4 electronic data with PDF publishing
Editing work, the reader will always be the topic Buy technical information, information on each topic of the annual demand of about a few dozen copies, if the information printed book-style, single of the cost would likely be very high, if the ordinary An electronic copy of the issue, are also easily stolen. PDF publication of the use of electronic data is a more satisfactory manner by the editor in electronic text into PDF before the special format can be set to increase the number of the copyright symbol, and set in the transformation can change the password. In this way, each topic can be condensed to a disk, users can choose to print PDF information, but could not be reproduced, from a certain extent to protect the interests of the editorial board.