In the rich text editor:
@FearTheRibsDemon
In a comment:
[FearTheRibsDemon](https://chowlings.com/user/FearTheRibsDemon)
For Names and Avatars:
In the rich text editor:
%FearTheRibsDemon
In a comment:
[![FearTheRibsDemon's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/FearTheRibsDemon) [FearTheRibsDemon](https://chowlings.com/user/FearTheRibsDemon)