To get the attention of a member in a busy group chat, you can use @mentions. Simply type a person's username after the @ sign, e.g.
@username, and the message will be highlighted in a special way for the intended recipient:
|Use the special @all mention to tag everyone inside of a group chat for important messages that you want everyone to see.|
|@mentions override the muted status of a window, so if someone has muted a busy group chat you can still get their attention using @mentions.|
|@mentions do not override the do not disturb status, so someone who wishes not to be disturbed will not be notified of your @mention.|