Oki CX3641MFP Technical Reference page 49

P
RINTING
3 Click the Paper Source icon.
4 Choose PostScript Custom Page Size from the Page Size menu, and then click Custom.
The Enter Custom Paper Size dialog box appears.
5 Specify options to define the custom page size.
Custom Page Size Dimensions:
Select a unit of measurement for the print job.
Unit:
6 Click OK to close the Enter Custom Paper Size dialog box.
7 Click OK to close the Printing Preferences dialog box.
You can now specify the custom page size from an application.
Specify the width and height of the print job.
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