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