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