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