1318efaron3 years ago000Where do I find the switch to lock this 550-sheet paper tray when it has already been placed (unlocked) under the printer? In the pictures, in picture 5, you can see the lock with a switch that I can't find in the machine. Thank you in advance.Show in original language (German)1 answerlorefach3 years ago000 Helpful answerHi, The switch is on the left side and can be reached through the notch where the printer can be lifted. This is also described in the instructions supplied with the printer.Show in original language (German)