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