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