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For example, if you wanted to secure Door 5, at the following prompt: SECURE DOOR 1 2 3 4 5 6 7 8 Press 5 then ENT. The display will read: SECURE DOOR 1 2 3 4 X 6 7 8 This indicates that all doors are at a normal state, except for Door 5, which is secured. 16. Press ESC to leave this subfunction, or enter another door number to unlock. NOTE: Each of these subfunctions act as a toggle. To return a door to its normal state, follow the same procedure you used to change its state. For example, if Do