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