Click the conversation you want to respond to . Click the Reply icon in the message header, or hover over the timestamp and click the Reply icon within the message . You can also click the Reply icon in the toolbar .
Note: If there is more than one recipient, you can reply-all to the conversation and everyone included will see your reply.
Reply to Message
Type your reply in the message field . You can attach a file or media . When you are ready, click the Send button .
View Sent Message
Your message appears in the preview text of the conversation  and at the top of the individual thread .