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