2.Select the unit, then enter the width and length measurements and click OK.
3.Check that User Defined now appears in the Size box on the Setup tab.
NOTE
To save the setting for future use:
•Click Paper Feed Options, then click Custom Size.
•Select the unit, then enter the relevant information for Width and Height and give your custom size a name under Name.
•Click Add.
•Click OK.
The Custom Page Size is added to the bottom of the Paper Size list.