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