In a conversation you may tag the person you're responding to by using the @ symbol, and then their username.
For demonstration purposes I will tag @Vekta just to show that it works. When you begin to to type their username it will show a drop down menu of the users that match what you type. Click the username and that user will be alerted that you are speaking to them in the alert tab.
For demonstration purposes I will tag @Vekta just to show that it works. When you begin to to type their username it will show a drop down menu of the users that match what you type. Click the username and that user will be alerted that you are speaking to them in the alert tab.