The Reply feature allows you to respond to a particular message in an individual chat or group. To reply to a message:

• Android: Tap and hold the message, then tap Reply . Type your response and tap Send .
  • Alternatively, swipe right on the message to reply.
  • To reply privately to someone who sent a message in a group, tap and hold the message, then tap More options > Reply privately.
• iPhone: Tap and hold the message, then tap Reply . Type your response and tap Send .
  • Alternatively, swipe right on the message to reply.
  • To reply privately to someone who sent a message in a group, tap and hold the message, then tap More > Reply Privately .
• Windows Phone: Long press the message, then tap reply. Type your response and tap send .
  • To reply privately to someone who sent a message in a group, long press the message, then tap reply privately.
• WhatsApp Web and WhatsApp Desktop: Hover over the message, then click Menu > Reply. Type your response and click Send ( or ).
  • To reply privately to someone who sent a message in a group, hover over the message, then click Menu > Reply privately.

Note: If you want to cancel a reply before sending, tap or click the "x" on the right side of the message.