Oki C5100 User Manual page 45

5. On the Setup
Size drop-down list. Define the custom size in the dialog box
which appears, then click OK.
You may see a
you do, click
needed changes to correct for the conflict.
6. Select the tray you will be using in the
under Media, then click OK.
7. Click Print.
tab, under Media, select
Warning dialog box indicating a conflict. If
OK and the driver will automatically make the
C5100: Using the Printer Driver • 45
User Defined Size
NOTE
Source
in the
drop-down list