Threaded messages make it easier to respond to specific messages and helps to keep track of new responses. Creating a new thread is easy, simply hover over the message that you would like to respond to and click the arrow.
Now, any response you send will reply to the thread and not on the main chat.
Click the arrow to return to the main chat.
Once a thread has been created, you can see how many messages are in the thread, click directly on this button to view and respond on a thread.
You can add emojis by clicking on the emoji button in the message box. You can get more options by using the : sign, followed by the type of the emoji you want. For example :smile should bring up smile emojis.