Meridian America 541 - Manual (Page 26)

Defining your own presets
20
To simplify the normal operation of the surround controller, and
to protect the settings from accidental changes, you can lock
the menus so the advanced parameters cannot be accessed.
To lock the menus
● Press Off to put the surround controller in standby.
The display shows:
.
● Press and hold down Mute for several seconds.
The display shows:
Locked
To unlock the menus
● Repeat the above sequence so that
the display shows:
Unlocked
Locking and unlocking the menus