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