Lexmark MB2236
From the control panel, navigate to:
Settings > Paper > Tray Configuration > Paper Size/Type > select a paper source
For non-touch-screen printer models, press to navigate through the settings.
Set the paper size and type.
Notes:
Adjust the paper guides and make sure that paper is loaded properly to avoid misfeeds.
Do you experience recurring paper jams? Load paper properly and check if the printer detects the correct paper size.