1. Start with your dominant hand in a "5" handshape (all fingers extended).
2. Place your hand flat on your chest, just below your collarbone.
3. Slide your hand outward in a straight line, as if you are opening a door.
The movement should be smooth and controlled, like you are actually opening a door.
Important Note: The sign for "door" can be modified depending on the context. For example, if you are talking about a specific type of door, you may add a sign for that type of door, like "sliding door" or "double door".