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.
From the printer control panel, navigate to:
> Settings > > General Settings > > Factory Defaults > > Restore Now >