Samsung CLP-350 - Manual (Page 26)

4 .5
5 Squeeze the paper length guide and slide in it until it lightly touches
the end of the paper stack.
6 Close the paper cover.
7 Slide the tray back into the machine until it clicks.
Note
After you load paper, you need to set up your machine for
the paper type, size, and source you loaded. See Software
section.
Changing the size of the paper in the paper tray
The tray is preset to Letter or A4 size, depending on your country. To
change the size to A4 or Letter, you must adjust the lever and paper width
guide properly.
1 Pull the tray out of the machine. Open the paper cover and remove
paper from the tray if necessary.
2 If you want to change the size to Letter, hold the lever at the back of
the tray, and rotate the lever clockwise.
3 Squeeze the paper width guide and slide it to the edge of the lever.
Note
If you want to change the size to A4, first move the paper
width guide to left and rotate the lever counterclockwise. If
you force the lever, it could damage the tray.