From the control panel, navigate to:
> Device > > Restore Factory Defaults > > Restore Settings >
Select Restore all settings, and then press .
To start the process, navigate to:
RESTORE > > Start >
For a more comprehensive method of restoring the factory default settings, see Erasing printer memory.
FAQs for Lexmark Secure by Default
Set the paper size to universal when the size that you want is not available from the Paper menu.