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