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