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