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