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