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