In the rich text editor:
@AshKat48
In a comment:
[AshKat48](https://chowlings.com/user/AshKat48)
For Names and Avatars:
In the rich text editor:
%AshKat48
In a comment:
[](https://chowlings.com/user/AshKat48) [AshKat48](https://chowlings.com/user/AshKat48)