A skilled one-handed tactile receiver may not need additional contact for clarity. Use your judgment about when to move to a two-handed tactile approach in order to convey the message most accurately. Some confusion or awkwardness in positioning can occur with various signs. For clarity, additional information may need to be added or a slight variation of the sign may need to be employed. Many signs are similar and can be easily misinterpreted by the consumer.
Simple additions can provide clarity.
Use your index finger in the palm of the consumer's hand. Stay in the palm area. Do not print down the hand toward the fingers. Be very clear about where a question is directed. Depending on the context of the question, a different sign may be employed.