SAP Message AC420 - You are changing over to the display mode. Screen layout rules not saved

Diagnosis
You are changing from maintenance mode to display mode.

System Response
You made changes to the screen layout rule. These changes cannot besaved in display mode.

Procedure
If you want to save your screen layout rule, you can either

  • Do so immediately

  • Return to change mode

  • Warning:
    If you are in display mode, the system does not inform you of the lossof data when you leave processing (Exit, Back or Cancel).