In the rich text editor:
@Starrmilky
In a comment:
[Starrmilky](https://chowlings.com/user/Starrmilky)
For Names and Avatars:
In the rich text editor:
%Starrmilky
In a comment:
[](https://chowlings.com/user/Starrmilky) [Starrmilky](https://chowlings.com/user/Starrmilky)