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