Samsung ML-2955ND-XAA - Manual (Page 37)

Media and tray
37 2. Menu overview and basic setup
 
5
Setting the paper size and type
After loading paper in the paper tray, set the paper size and type.
Open the Printing Preferences (see "Opening printing preferences"
on page 40) and set the paper size and type in the Paper tab.
If you want to use special-sized paper such as billing paper,
select Custom in the Paper tab in the Printing Preferences
(see "Opening printing preferences" on page 40).
 
6
Using the output support
The surface of the output tray may become hot if you print a
large number of pages at once. Make sure that you do not
allow children near it.
Open the output support before printing. The printed pages stack on
the output support, and the output support will help the printed
pages to align. The printer sends printouts to the output tray by
default.