Casio XJ-450 User Manual page 76

Using the Setup Menu
2.
Press the [ENTER] key.
This displays a confirmation message asking if you want to initialize all settings.
3.
Use the [ ] and [ ] keys to select [Yes].
4.
Press the [ENTER] key to initialize all menu settings, or the [ESC] key
to exit the initialize operation without doing anything.
Pressing the [ENTER] key initializes all menu items except for "Language" and "Lamp
Time".
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