Epson EPL-N3000 Reference Manual page 156

Paper size pop-up menu
This pop-up menu automatically shows the paper size that is
selected on the Page Attributes setup page. You can change the
paper size by clicking on the menu and selecting the desired paper
size to customize.
Paper Size
Enter the desired Width, Height, and Offset values for the custom
page.
PPD Limits
Click the pop-up menu and select the various attributes to view
the minimum and maximum values permitted by the selected
PPD (PostScript Printer Description) file.
Margins
Specify the desired Top, Bottom, Left, and Right margin values.
Custom Page Name
Enter a name for the custom page that you are creating.
Remove
Click to delete the custom page selected in the paper size pop-up
menu. This button is grayed out when a non-custom paper size
is selected.
Add
Click to add the custom page that you are creating onto the list of
selectable paper sizes. This button is grayed out if nothing is
entered into the Custom Page Name text box.
Using the PostScript Printer Software (Macintosh)
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