HP 2820 - Manual (Page 61)

Setting a custom paper size
Use the Custom Paper feature to set up the printer to print to sizes other than standard ones.
● Windows: Try to set this setting from one of these locations, in this order: the Page
Setup dialog box in the program, the Print dialog box in the program, or the Paper tab
in the printer driver.
● Mac OS 9.2.2: Gain access to Custom Paper features in the Page Setup dialog box. On
the Page Attributes pop-up menu, select Custom Page Size.
● Mac OS 10.2 or 10.3: To set a custom paper size, click File, and then click Page Setup.
Click the Page Attributes menu, and select Custom Paper Size.
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