In the rich text editor:
@Salmica
In a comment:
[Salmica](https://chowlings.com/user/Salmica)
For Names and Avatars:
In the rich text editor:
%Salmica
In a comment:
[![Salmica's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Salmica) [Salmica](https://chowlings.com/user/Salmica)