Glad you asked...
Raise your hand at an angle and touch your index finger and your middle finger to your lower lip. Then, move your hand away from your lip with your fingers extended and showing your palm. Thank you in Sign Language http://www.lifeprint.com/asl101/pages-si...
Then again, this answer might help you...
Sign language is a great language to learn! Many words aren't translated from English to American Sign Language. Your welcome is one of the words that doesn't have a sign. Many times in response to thank you, those that use sign language will simply nod their head or give a thumbs up sign.

