Yamaha DME Designer Owner's Manual page 287

Status Bar
The lock icon will appear in the User Module when security is active.
User Module properties
User Module (page 250).
The lock icon will appear locked when the password has not been entered, and layouts edited in the
Design Mode cannot be saved.
When the password is entered it becomes temporarily possible to save the layout.
The lock icon will not appear if the [Enable Security] checkbox in the "Properties" dialog box is not
checked.
(page 181).
Chapter 5 Components
DME Designer Owner's Manual 287