In the exit door arming procedure, what is the third step?

In the exit door arming procedure, the third step involves manipulating the lever. This step is crucial because the lever activates the arming mechanism of the emergency exit door, allowing it to function properly in case of an evacuation situation. When the lever is moved to the correct position, it ensures that the door can be opened normally during an emergency, thus facilitating a quick exit for passengers and crew. The correct positioning of the lever is essential for the overall safety and efficiency of emergency procedures on the aircraft.