Apple LaserWriter 12/640 PS - Manual (Page 208)

4 Make the selections you want.
5 When the selections are what you want, choose another setting from the Settings pop-up
menu or click Print.
Background printing and setting the print time
With background printing turned on, you can use your computer for other
work while you’re printing. Once background printing is turned on, it is in
effect whenever you print, until you turn it off. When you click Print in the
Print dialog box, a message appears for a moment to tell you the document is
being prepared. Once the message disappears, you can continue other work.
Your computer may pause occasionally while it processes the document for
printing.
When foreground printing is turned on, you must wait until the document has
finished printing before you can use your computer for other work. However,
your document may be sent to the printer faster when foreground printing is
turned on.
You can also specify when your document should be printed in relationship to
other documents that are also being printed.
1 Choose Print from the File menu.
The Print dialog box appears.
183 Mac OS Users
You can save the file
as ASCII or Binary.
Binary files are
typically smaller
in size.
Font inclusion lets you
print the font on any
computer without
relying on font
substitution.