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