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