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