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