Adobe photoshop cs2 Manuel D’Utilisation

ADOBE PHOTOSHOP CS2 

By default, the printer driver transfers binary information to PostScript printers; however, you can choose to transfer
image data using JPEG or ASCII85 encoding. (ASCII85 is a text-encoding method for binary data; it is more
compact than ASCII encoding.) These options are not available for non-PostScript printers, including many inkjet
printers.

Because JPEG-encoded files are smaller than binary files, they take less time to print; however, using JPEG encoding
decreases image quality. Only PostScript Level 2 (or higher) printers support JPEG encoding; if you send a JPEG­
encoded file to a PostScript Level 1 printer, you may get PostScript language errors.

Some print spooler programs, computer networks, and third-party printer drivers don’t support binary files or JPEG­
encoded files. Also, some PostScript output devices accept binary and JPEG-encoded image data only through their
AppleTalk and Ethernet ports, not their parallel or serial ports. In these situations, you can select the ASCII85
encoding method. However, ASCII85 files contain about twice as many characters and take twice as long to transfer
as binary files.

Choose File > Print With Preview.

Select More Options (it is already selected if Fewer Options is displayed), and choose Output from the pop-up

menu.

Select an option from the Encoding menu.

A trap is  an  overlap that prevents tiny gaps in the  printed image  caused  by  a slight  misregistration on press. Contact  
your service provider before you do any trapping. In most cases, your print shop determines whether trapping is 
needed. If so, the print shop staff will tell you what values to enter in the Trap dialog box.