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Step 13. User Setup Number 0670: Screen Lockout Function.
To change Options, press the Up or Down arrow key to the right of the number in the lower right
corner of the screen. Options:
0 — All keys are available. Screen is unlocked.
1 — Screen is partially locked. All key functions are locked except the Temperature Up and Down
keys and the Cancel key. Enter Advanced Setup to unlock the screen.
2 — Screen is fully locked. Enter Advanced Settings to unlock the screen.
Step 14. Exit User Setup
Press the Done key to exit Advanced Settings and return to the Home Screen.