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