What must be done with the cabin door safety strap when the door is opened?

When the cabin door is opened, extending the safety strap across the door opening is crucial for safety. This practice serves multiple purposes: it prevents the door from swinging too wide, which could pose a risk to individuals near the doorway or cause damage to the aircraft. Additionally, having the strap extended provides a visual indication that the door is open, alerting ground personnel and passengers to exercise caution when approaching or exiting the aircraft. This measure is part of standard operating procedures to ensure that everyone remains safe during boarding and deplaning activities.