In the rich text editor:
@asbooztos
In a comment:
[asbooztos](https://chowlings.com/user/asbooztos)
For Names and Avatars:
In the rich text editor:
%asbooztos
In a comment:
[](https://chowlings.com/user/asbooztos) [asbooztos](https://chowlings.com/user/asbooztos)