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