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