Adobe ACROBAT READER 4.0 - MANUAL 2 Manual page 8

OS, this specifies whether to print using PostScript (without selecting level) or
to print pages as bitmap images.
Force Language Level 3 (Mac OS) prints the pages using LanguageLevel 3
PostScript. Select this option if you're printing PostScript to a file rather than to
a printer and you want to use LanguageLevel 3 PostScript. (When you send
PDF to a printer, let the printer driver specify what level of PostScript to use.)
This is available only when you choose PostScript in the Print Method pop-up
menu; if you choose PostScript in the menu and do not select this option, Level
2 PostScript is used.
Download Asian Fonts downloads Asian fonts to a PostScript printer. Select
this option if you want to print a PDF document with Asian fonts but do not
have the fonts installed on the printer and do not have the fonts embedded in
the document. (Embedded fonts are downloaded whether or not this option is
selected.) You can use this option with a PostScript Level 2 or higher printer, or
a Level 1 printer that supports Type 0 font extensions.
Note: Some fonts cannot be downloaded to a printer, either because the font is
a bitmap or because embedding of the font is restricted in that document. In
these cases, a substitute font is used for printing, and the printed output may
not match the screen display exactly.
Adobe® Acrobat® Reader 4.0
Page 8