Sony MCM-2250NB Instructions For Use Manual page 11

About the memory of the settings
The settings are automatically stored in the monitor
memory.
About the protection of the setting values
You can protect the setting values using [Control Lock].
When the values are protected by the control lock
function, you cannot change the values.
To change the values, set [Control Lock] to [Off].
For details, see [Control Lock] (page 14).
11
Using the Menu