Xerox Phaser 3300MFP - Manual (Page 38)

5.9
<Loading originals and print media>
Printing to the rear cover
Using the rear cover, paper comes out of the machine face up.
Printing from the multi-purpose tray to the rear cover provides a straight
paper path. Using the rear cover might improve the output quality with
special print media.
To use the rear cover, open it by pulling down.
Caution
The fuser area inside the rear cover of your machine becomes
very hot when in use. Take care when you access this area.