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