In the rich text editor:
@ATL0SS
In a comment:
[ATL0SS](https://www.whistlercrest.com/user/ATL0SS)
For Names and Avatars:
In the rich text editor:
%ATL0SS
In a comment:
[](https://www.whistlercrest.com/user/ATL0SS) [ATL0SS](https://www.whistlercrest.com/user/ATL0SS)