When communicating with people in a Discord channel, you may need to direct a message to one person instead of the entire group. If you'd like to private message a person, you can by tapping on their username. But, if you want to message that person within the channel, you can do that too. Simply type the @ before typing their username. A list will appear, and you can select the contact from there or type the full name. When the message appears in the group chat, their name will be highlighted, indicating that message is specifically for them.