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