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