Samsung ProXpress M403 Series User Manual page 33

Media and tray
The use of flammable media or foreign materials left in the printer may lead
to overheating of the unit and, in rare cases may cause a fire.
The amount of paper put into the tray may differ according to media type used
(see "Print media specifications" on page 102).
3
Tray overview
To change the size, you need to adjust the paper guides.
1
2
3
1 Paper length guide
2 Paper width guide
3 Paper limit mark
2. Menu Overview and Basic Setup
33