Lexmark All in One Printer - Manual (Page 18)

18 Using the Operator Panel and Menus
Menus disabled If your printer is configured as a network printer available to a num-
ber of users, it is possible that
Menus Disabled displays when you
press Menu> or <Menu from the Ready state. Disabling the menus
prevents users from using the operator panel to inadvertently
change a printer default that has been set by the person managing
the printer. You can still clear messages and select items from the
Job Menu when printing a job, but you cannot change other printer
settings. You can, however, use your printer driver to override printer
defaults and select settings for individual print jobs.