# Category 9: Answer Message Feature Bits

This category controls the Answer function, including attach-message feature bits. Answer messages feature bits allow the user to directly answer messages from other users. For information about marking an answer “confidential,” and activating a return receipt for the answer, see Message Addressing, Category 13.

Bit | Description | Required | Incompatible
--- | --- | --- | ---
019 | Answer and mark urgent | 029, 040 |
029 | Answer messages (Master) |  |
030 | Answer and request receipt | 029, 040 |
031 | Answer and mark confidential | 029, 040 |
038 | Attach original message to answer | 029 |
147 | Send receipt after full play | 145 |
158 | Continue sending message | 020 or 024 or 029 |
270 | Enable Dial-back feature | 263, 264, 280 |