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