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