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