1. Touching your chin with your index finger, then moving your hand away from your face in a downward motion. This sign is commonly used for expressing gratitude.
2. You can also add a small movement with your other hand, making a "C" shape and bringing it up to your chest. This emphasizes the "thank you" and can be used for more formal situations.
It's important to note that BSL is a visual language, so learning the signs through videos or with a qualified BSL instructor is essential for accurate understanding and communication.