In the rich text editor:
@luzonbleedingheart
In a comment:
[luzonbleedingheart](https://chowlings.com/user/luzonbleedingheart)
For Names and Avatars:
In the rich text editor:
%luzonbleedingheart
In a comment:
[![luzonbleedingheart's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/luzonbleedingheart) [luzonbleedingheart](https://chowlings.com/user/luzonbleedingheart)