You can expand your writing area and view all formatting options clicking the T and entering by entering Compose mode (Figure 1):
Figure 1 Compose mode
In compose mode, you can use enter to add a new line and easily add bold or italicized font plus bullet points and code snippets to format your message (Figure 2):
Figure 2 Formatting options
Users will still also be able to send emojis, add attachments and view the Chat details in Compose mode (Figure 3):
Figure 3 Chat options
Note: In the Symphony Desktop Application (SDA), users will also be able to send a Chime.