If you want to keep a list of the current menu settings for reference, then print a menu settings page before restoring the factory default settings. For more information, see Printing a menu settings page.
If you want a more comprehensive method of restoring the printer factory default settings, then perform the Wipe All Settings option. For more information, see Erasing non‑volatile memory.
Warning—Potential Damage: Restoring factory defaults returns most printer settings to the original factory default settings. Exceptions include the display language, custom sizes and messages, and Network/Port menu settings. All downloads stored in the RAM are deleted.
From the printer control panel, navigate to:
> Settings > 
> General Settings > > Factory Defaults > > Restore Now >