In the rich text editor:
@DocZer0
In a comment:
[DocZer0](https://chowlings.com/user/DocZer0)
For Names and Avatars:
In the rich text editor:
%DocZer0
In a comment:
[![DocZer0's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/DocZer0) [DocZer0](https://chowlings.com/user/DocZer0)