Lexmark All in One Printer - Manual (Page 10)

10 Using the Operator Panel and Menus
Return Press the Return button to return to the previous menu level or
menu item.
Stop Press the Stop button at the Ready , Busy , or Waiting message to
temporarily stop all activity and take the printer offline. The operator
panel status message changes to
Not Ready .
Press Go to return the printer to the Ready , Busy , or Waiting state.