Lexmark MS610dn / MS610dtn
The Universal paper size is a user‑defined setting that lets you print on paper sizes that are not preset in the printer menus.
From the printer control panel, navigate to:
> Settings > > Paper Menu > > Universal Setup > > Units of Measure > > select a unit of measure >
Select Portrait Width or Portrait Height, and then press .
Press the left or right arrow button to change the setting, and then press .