Apple LaserWriter 12/640 PS - Manual (Page 209)

2 Choose Background Printing from the Settings pop-up menu.
The Background Printing dialog box appears.
3 Make the selections you want.
4 When the selections are as you want, choose another setting from the Settings pop-up
menu, or click Print.
Selecting the output tray
You can specify where the printed pages exit the printer. Use face-up output
to reduce curl and wrinkles. This is useful for envelopes, transparencies,
labels, and other heavy stock paper.
You can use face-up output with or without the optional face-up output tray.
However, the face-up output tray stacks the papers neatly in a tray instead of
on the surface where the printer is located.
Note: You cannot direct the output to face-up when duplex printing. You
cannot direct U.S. legal-size paper to the face-up output.
1 Choose Print from the File menu.
The Print dialog box appears.
2 Choose Printer Options from the Settings pop-up menu.
The Printer Options dialog box appears.
184 Chapter 6